EonPath User`s
Contents
1. for configuring multipath devices del md for deleting multipath devices add path for adding a path on the specified device remove path for removing a path on the specified device set disk for setting I O path state setlb for setting device load balancing policy stat for gathering I O statistics version for displaying EonPath driver version help for displaying all EonPath commands quit exit for exiting configuration 36 EonPath User s Manual Configuration Commands list lun This command displays all currently mapped LUNs RAID storage volumes associated with host ID LUNs that appear on the host links to an application server Example Idx Device Device S N Size 0 dev dsk c4t112d0p4 0x0888882238B47500 4400 MB list md This command displays configured Multipath devices i e RAID volumes configured through the multipathing configuration detail md This command brings out detailed information of a selected Multipath device a RAID volume as the multipathing configuration target Example EonPath detail md Idx Device Device S N Paths Size 0 dev dsk c179t179dIsO 0x0888882238B47500 1 400 MB Select Multipath Device Index Input 1 for Cancel 0 0 Multipath Device dev dsk c179t179dlsO LoadBalance Mode Mini Queue Paths List Idx Device Device S N State 0 dev dsk c4t112d0s0 0x0888882238B47500 ok EonPath Multipathing Package for2. vev J e B m Copyright iftdsm cat iftdsm inf iftdsm sys install bat O A g B install exe mpdev inf mpdev sys MFIO cat mpio inf a Bom lt I I mpio sys mpspflt sys Support mo RASS Methods to Check if the MPIO Program Is Installed Correctly To have the multipathing protection running on your Fibre or iSCSl storage network please make sure the MPIO program is installed successfully You can check if the MPIO program is installed for the Fibre RAID subsystems in the Computer Management window Installation To verify if the MPIO program is installed successfully first open the Computer Management window from Settings gt Control Panel gt System gt Hardware tabbed window gt Device Manager Click to select Device Manager from the category tree on the left EonPath MPIO for Windows 25 EonPath User s Manual O Computer Management Sj Ble Acton yew Window Hep 18 xi e omae a Computer Management Local flg System Tools Ej Event Viewer Shared Folders Local Users and Groups Performance Logs and Alert IFT A16F R2221 Multi Path Disk Device Device Manager lt IFT A16F R2221 SCSI Disk Device fi Storage lt IFT A16F R2221 SCSI Disk Device Removable Storage ar IFT A16F R2221 SCSI Disk Device Disk Defragmenter IFT A16F R2221 SCSI Disk Device Disk Management D b Disk USE gla Services and Applications lt ST380817AS WV Display adapters DVD CD ROM drive
3. EonPath gt gt help Displays all available functions quit exit Exits the current configuration console Configuration Change Concerns If the need arises for a configuration change connecting different host ports etc reboot the system and use EonPath commands such as make md and add path to activate the new connection 40 EonPath User s Manual Uninstalling EonPath Packages 1 2 Stop host application I Os to the RAID subsystem Use the pkgrm command to uninstall the EonPath package The uninstallation process should look like the following bash 3 00 pkgrm EonPath The following package is currently installed EonPath EonPath infortrend multipath package sparcv9 1 0 1 20 Do you want to remove this package y n q y Removing installed package instance lt EonPath gt This package contains scripts which will be executed with super user permission during the process of removing this package Do you want to continue with the removal of this package y n q y Verifying package dependencies Processing package information tt Executing preremove script Removing pathnames in class lt application gt Removing pathnames in class none usr bin EonPath usr bin lt shared pathname not removed gt usr lt shared pathname not removed gt kernel drv sparcv9 mpio_path kernel drv sparcv9 lt shared pathname not removed gt kernel drv mpio_path conf kernel dr
4. Overview Infortrend participated in Microsoft s Multi path I O MPIO program and developed a set of self developed drivers to facilitate multipathing solutions under a native Windows architecture Infortrend s MPIO implementations aim to provide failover capabilities through the use of redundant physical path components to redistribute the Read Write load among multiple paths and to avoid the interoperability issues with storage devices from different vendors With a single host bus connection any of the physical path components between host and storage host bus adapters cables and switches can become a single point of failure and a potential performance bottleneck Cabling failures can easily occur due to poor contact dirty interface media or overstressed fibers Redundant hardware advanced RAID technology and failover capabilities are used to enhance fault tolerance in environments where mission critical data needs to be continuously available Supported Hardware The MPIO driver program is designed for use with subsystems built around the ASIC266 or ASIC400 platforms These supported subsystems include the EonStor series Fibre to Fibre Fibre to SATA and iSCSI to SATA RAID subsystem series or Fibre to Fibre controller heads Supported OS Windows Server 2000 Server 2003 x86 or x64 versions Installation Prerequisites Environmental Prerequisites g The host computer s must be connected to Infortrend s RAID stor
5. and execute the INSTALL file You will need to untar the package to extract the driver files to a preferred location Step 3 The terminal screen should look like this root linux as3jk EonPath cd EonPath root linux as3jk EonPath II total 28 drwxr xr x 4 root root 4096 Jun 6 12 23 config drwxr xr x 2root root 4096 May 25 18 47 i686 rwxr xr x 1root root 2973 Jun 6 16 58 INSTALL rwxr xr x 1root root 778 May 19 14 52 mkdev_24 sh drwxr xr x 2root root 4096 Jun 23 13 49 objs rw r r 1 root root 434 Jun 6 15 54 README rwxr xr x 1root root 951 Jun 6 14 47 UNINSTALL root linux as3jk EonPath INSTALL Step 4 When prompted by a confirm message press y to proceed You will then be reminded to reboot the system for the installation to take effect Install config file EonPath to sbin Install EonPath Driver for Kernel 2 4 21 4 ELsmp Wait for making nodes install rc modules call depmod Install Completed Please reboot system Step 5 The default location of an installed package is shown below You may then execute the package root linux as3jk EonPath cd sbin root linux as3jk sbin EonPath EonPath gt gt help Step 6 Type help to display all configuration commands You should then proceed with configuring multipathing devices EonPath gt gt help command list listlun wee for listing current IFT LUNs listmd for listing current multipath devices detailmd for displaying
6. details of multipath devices make md for configuring multipath devices delmd for deleting multipath devices add path for adding a path on the specified device remove path for removing a path on the specified device setdisk for setting I O path state 46 EonPath User s Manual setlb for setting device load balancing policy statis for gathering I O statistics help for displaying all EonPath commands version for displaying EonPath driver version quit for exiting configuration Configuration Commands list lun This command displays all currently mapped LUNs RAID storage volumes associated with host ID LUNs that appear on the host busses Example Idx Device LUN_S N Size 0 dev sda 0x0A11145E7E8A0300 4400 MB 1 dev sdb 0x0A21145E7E8A0300 4400 MB list md This command displays the configured RAID volume s devices configured in the multipathing configuration Example Idx Device LUN_S N Paths Size 0 dev ift_md0a 0x0A11145E7E8A0300 2 4400 MB g NOTE Due to different kernel versions in Linux OS the multipath device names will be slightly different For kernel 2 6 ent 4 and fedora 5 the name is ift mdN N is a number between 0 and 63 For kernel 2 4 ent 3 the name is ift mdNC N is a number between 0 and 3 while C is an alphabetic character ranging from a to p detail md This command brings out detailed information of a selected Multipath device a RAID volume as
7. same intelligent failover mechanisms to eliminate single point of failure If you are using the EonStor series RAID subsystems that come with Fibre Channel host ports the Fibre HBA cards and its driver should be installed to the host computer s prior to EonPath program installation Firmware version 3 47x or above must be running on your RAID subsystem Hardware Prerequisites The EonPath program aims to eliminate every single point of failure for high availability environments Therefore it is preferred your storage subsystems also come with fully redundant and hot swappable modules e g EonStor models that come with dual redundant RAID controllers To create path redundancy in a Fibre Channel storage network or applications using other host side links apply at least two 2 single ported HBA cards or two 2 dual ported HBA cards for models featuring more than dual host ports on the host computer s Before installing and using the program RAID volumes must be created and properly associated with host ID LUNs for using the multipathing functions 44 EonPath User s Manual NOTE For logical drive creation LUN mapping and Firmware configuration please refer to the RAIDWatch User s Manual or firmware Operation Manual that came with your RAID subsystem EonPath Multipathing Package for Linux 45 EonPath User s Manual Installation Step 1 Open a Linux Terminal Step 2 Locate the EonPath package files
8. Association CHO AID 112 CHO BID 113 CH1 AID 112 CH1 BID 113 LD Logical Drive AID ID Managed by Controller A BID ID Managed by Controller B AID 112 BID 113 AID 112 BID 113 Channel 0 Channel 1 RAID Subsystem Redundant Controller Subsystem Every two ports on different RAID controllers are hubbed together bound to one channel Figure 5 DAS with Hubbed Ports Configuration Tasks Map LDO to an AID on channel 0 Map LDO to an AID on LDO channel 1 for redundant path access 0 112 N A 1 112 N A Map LD1 to a BID on channel 0 0 N A 113 Map LD1 to aBID on LD1 channel 1 for redundant path access 1 N A 113 1 This configuration applies to a redundant controller subsystem which is attached to a host computer with or without intermediate FC switch devices Storage side Configuration EonPath User s Manual 2 For simplicity of the diagram only two host links are shown here All host ports can be used and therefore the subsystem can connect up to two application servers with fault tolerant links Two logical drives are separately associated with either Controller A or Controller B IDs on separate host channels Hubbed ports are the same host ports on different controllers combined into a shared host loop and provide path redundancy without FC switches 5 SAN with FC Switches Onb
9. Fax 44 1256 707 889 sales eu infortrend com support eu infortrend com http esupport infortrend europe com http www infortrend com EonPath User s Manual Copyright 2007 This Edition First Published 2007 All rights reserved This publication may not be reproduced transmitted transcribed stored in a retrieval system or translated into any language or computer language in any form or by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written consent of Infortrend Technology Inc Disclaimer Infortrend Technology makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose Furthermore Infortrend Technology reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation to notify any person of such revisions or changes Product specifications are also subject to change without prior notice Trademarks Infortrend the Infortrend logo EonStor and RAIDWatch are all registered trademarks of Infortrend Technology Inc EonPath and other names prefixed with IFT and ES are trademarks of Infortrend Technology Inc Various versions of Sun Solaris and Linux OS are registered trademarks of Sun Microsystems Inc and RedHat Inc Microsoft Windows Windows 2000 Windows XP
10. HO AID 112 CH1 AID 113 Configuration Tasks RAID Subsystem Figure 2 Simple DAS channel 1 for redundant path access Map LDO to an AID on 112 N A channel 0 Map LDO to an AID on LDO 113 N A N This configuration applies to a single controller subsystem which is directly attached to a host computer without intermediate networking devices A logical drive is associated with host channel IDs on different host channels NOTE You may use different channel IDs than are shown here in the sample topologies IDs used in the sample configurations are mostly default numbers in firmware As long as the IDs are carefully selected according to the configuration rules there is no limitation on selecting different host channel IDs AID and BID apply to firmware release 3 48 or later Before firmware release version 3 48 PID Primary ID and SID Secondary ID are used instead Storage side Configuration 11 EonPath User s Manual 2 Simple DAS Onboard Hub Disabled FW3 48 Mapping Method Server LD to Host ID Logical Association CHO AID 112 gt De CH1 BID 113 LD Logical Drive AID ID Managed by Controller A BID ID Managed by Controller B OIIE RAID Subsystem Figure 3 Simple DAS with Disabled Hub Configuration Tasks Map LDO to an AID on 0 0 112 N A channel 0 Map LDO to a BID on LDO 0 1 N A 113 channel 1 for redu
11. Infortrend User s Manual EonPath Multipathing Packages for Windows Solaris and Linux OS EonPath User s Manual Contact Information Asia Pacific International Headquarters Infortrend Technology Inc 8F No 102 Chung Shan Rd Sec 3 Chung Ho City Taipei Hsien Taiwan Tel 886 2 2226 0126 Fax 886 2 2226 0020 sales ap Qinfortrend com support ap Qinfortrend com http esupport infortrend com tw http www infortrend com taiwan China Infortrend Technology Limited Room 1210 West Wing Tower One Junefield Plaza No 6 Xuanwumen Street Xuanwu District Beijing China Post code 100052 Tel 86 10 6310 6168 Fax 86 10 6310 6188 sales cn Qinfortrend com support cn Qinfortrend com http esupport infortrend com tw http www infortrend com china Japan Infortrend Japan Inc 6F Okayasu Bldg 1 7 14 Shibaura Minato ku Tokyo 105 0023 Japan Tel 81 3 5730 6551 Fax 81 3 5730 6552 sales jp Qinfortrend com support jp Qinfortrend com http esupport infortrend com tw http Awww infortrend com japan Americas Infortrend Corporation 2200 Zanker Road Unit D San Jose CA 95131 USA Tel 1 408 988 5088 Fax 1 408 988 6288 sales us infortrend com http esupport infortrend com http www infortrend com Europe EMEA Infortrend Europe Limited 1 Cherrywood Stag Oak Lane Chineham Business Park Basingstoke Hampshire RG24 8WF UK Tel 44 1256 707 700
12. K IF THE MPIO PROGRAM IS INSTALLED CORRECTLY eene 25 KL 25 MICROSOFT ISCSI INITIATOR DOWNLOAD ou eesssseeessseeeesecceceesueeeceesaeeeceeeeeessaseecsesaeesessneeens 28 INSTALLING THE ISCSI INITIATOR eeonavororrvnrrnennnnrrvnnnrnernannrnnnrnrsnensnnrnnnenssennennrnnsrnssnessnnnnnsenenee 28 ISCSI INITIATOR CONFIGURATION ccsssceceessececseseececeneeecesaececseeeececseeeceesaeeeceeseeesenneeeenees 29 EONPATH SOLARIS PACKAGE OVERVIEW csessesssceeececsesensececececsessnssceeececeeseeseeeeeesenennsaeees 33 SUPPORTED HARDWABE o erveei tecto tne tle eoo oon e Eo eee EE tree Gos eee rete deve ERS eios 34 SUPPORTED OS Te 34 INSTALLATION PREREQUISITES 5c03 c3 s2sss000ieseeees seseesecesceass edsiessdesvoasssocceceedeavoeed asceesdsenvocresees 34 Environmental Prerequisites ees eee eerte eene 34 Hardware Prerequisites acero d ramp PRI p BIER ER ERA CENE RNES RENE ears 34 INSTALLATION sanden 35 CONFIGURATION COMMANDS 2 cccccccccecscscsuscecsuscscscsusueususcsuscsusesuscsusususesescsusesseueusceveseueveueens 37 CONFIGURATION CHANGE CONCERNS ou ccccccccccecccsccceccescscscccecscsescscscscscscscscsescscecaceseusveuevevevans 40 UNINSTALLING EONPATH PACKAGES eee eene stesse esse enses esses sese sese seen eie 41 Section Five EonPath Multipathing Package for Linux 43 EonPath User s Manual EONPATH LINUX PACKAGE OVERVIEW cccccssssssececececse
13. Solaris 37 EonPath User s Manual make md This command selects a specific RAID volume into Multipath device configuration Example EonPath make md Idx Device Device S N Paths 0 N A 0x0888882238B47500 1 Select Multipath Device Index Input 1 for Cancel 0 0 EonPath Device dev dsk c179t179dlsO create success del md Disassociate a RAID volume from the multipathing configuration scheme add path Combines an additional I O path with an existing RAID volume making it the alternate I O route for data path redundancy remove path Disassociate a configured I O path from an existing RAID volume set disk Specifies I O paths as Active or Passive I O route Example bash 3 002 EonPath EonPath gt gt set disk Idx Device Device S N Paths Size 0 dev dsk c188t188d1sO 0x00012354EB30B600 2 4096 MB Select Multipath Device Index Input 1 for Cancel 0 Multipath Device dev dsk c188t188d1s0 LoadBalance Mode Mini Queue Paths List Idx Device Device S N State 0 dev dsk c6t115d0s0 0x00012354EB30B600 Ok 1 dev dsk c5t115d0s0 0x00012354EB30B600 Ok Select Path Index Input 1 for Cancel 0 Set Path State to 0 Active 1 Passive 2 Ok Input 1 for Cancel 0 0 EonPath Set device state success for dev dsk c6t115d0s0 set Ib Specifies a load balancing policy for your multipathing configuration The configurable options are 38 EonPath User s Manual 0 Fail Over two I O
14. TPGS Target Port Group Service or previously known as ALUA Asymmetric Logical Unit Access for making maximum use of host link bandwidth TPGS Implementation The TPGS methodology obtains I O traffic statistics from EonPath drivers and let the drivers determine if I Os should be balanced between data paths I Os can be selectively distributed through more than one I O path and thus making maximum use of the processing power of both RAID controllers and data path bandwidth With firmware release 3 48 a logical drive can be associated with IDs managed by different RAID controllers The methodology dynamically balances I Os on the data path partners through the backplane and to the hard drives Overview EonPath User s Manual e cue onto o vtt os Og s 5 23 E ee o e 29 a v 2 a 8 a fr RCC Link g ws Figure 1 Selecting an Optimal Path Symmetric Asymmetric I O Load Balancing In addition to failover support the Multipathing software can use any active paths to a RAID volume to send and receive I Os With I Os routed through multiple host connections bandwidth can be increased by the addition of host controllers The Multipathing software uses a round robin mini Queue or failover algorithms by which individual I O requests are routed to active host controllers in a series one after the other or using an adaptive least I O queue method Mini Queue Load Balancing Breaking the
15. Windows 2003 Windows Server 2003 and Windows Storage Server 2003 are registered trademarks of Microsoft Corporation in the U S and other countries All other names brands products or services are trademarks or registered trademarks of their respective owners EonPath User s Manual Table of Contents CONTACT INFORMATION eeiceeesesVeeekuecucee readers 2 COPYRIGHT 2007 Lied 3 This Edition First Published 2007 ororonononononononononononenenenenenenenenenenenenenenenenenenenenenenenenenenener 3 GDI UNA ANERE E EAEE EN ds estote esed fer eensete a Prio tak reni ed o a E ics ee AE ee 3 Trademarks 3 TABLE OF CONTENTS cccssssssscccececsessssecececccsessnseaecececsesenseaeeecececseeaaesecececsesseaeeesececsenseaeaeees 4 ABOUT THIS MANUAL s rorrrrrrernennrnnnensneenennnnrnensneenennnnrnrnsnssnenannrnnneneseenennnnnnenesesnennnnnsensnsnsenennnsen 6 WHO SHOULD READ THIS MANUAL cceccccccccecsesssececececsesseaeceeececeesssaececececsessasseeeeeeseneaeaeees 6 RELATED DOCUMENTATION erorvrrrrerrennnnrrensneerensnnrrensssssenannrnensnessensnnrnnnenssnenannnnnneneneenennnnnnensnee 6 LIMITATION oie ceret eve socer ree eee er d d eoe Pe Y EUN EE REV Y NE EV OER EUER NEN E EINER Fe AR Pe TEE NENE 6 Section One Overview ssssssssssessesssossssosoesososossosoesooosossosoesoossossosssssosssssesessoss DESIGN CONCERNS M eain 9 PROS AND CONS OF VARIOUS CONFIGURATIONS ccssscesseseeee
16. age using fault tolerant cabling devices either end to end or via routing devices such as Fibre Channel switches or GbE Ethernet switches The driver level MPIO then manages the fault tolerant connections In a Fibre Channel SAN environment the same level of intelligent path management mechanisms should be implemented to handle 20 EonPath User s Manual problems such as misaddressing a device after a disruption of an FC Arbitrated Loop If you are using the EonStor series Fibre host RAID subsystems the Fibre HBA cards and its associated driver should be installed to the host computer s prior to the MPIO program installation 7 If you are using the EonStor iSCSI series subsystems either iSCSI initiator cards along with its drivers or Ethernet cards with iSCSI initiator software should be installed to the application servers s prior to the EonPath installation When using software initiator the associated software configuration should be completed before EonPath installation n an IP SAN built on Ethernet cards appropriate configuration of Microsoft iSCSI initiator or software by other vendors should be completed before applying EonPath s MPIO capabilities g Firmware version 3 47x or above must be running on your RAID subsystem controller Hardware Prerequisites 7 The MPIO program aims to eliminate every single point of failure for high availability environments Therefore it is preferred your storage
17. ards or two 2 dual ported HBA cards for models featuring more than dual host ports on the host computer s Before installing and using the EonPath program RAID volumes must be created and properly associated with host ID LUNs for using the multipathing functions NOTE For logical drive creation LUN mapping and Firmware configuration please refer to the RAIDWatch User s Manual or firmware Operation Manual that came with your RAID subsystem 34 EonPath User s Manual Installation Step 1 Right click on a Sun CDE desktop to display the Workspace and then the Tools menu Step 2 Open a terminal and use the pkgadd command to begin installing EONPATH package Step 3 The shell screen should look like this Bash 22 05b pkgadd d EonPath 1 0 1 3 sparc pkg The following packages are available 1 EonPath EonPath Infortrend multipath package sparcv9 10 13 Select package s you wish to process or all to process all packages default all q all Processing package instance lt EonPath gt from lt test EonPath 1 0 1 3 sparc pkg gt EonPath Infortrend Technology Inc C 2006 Infortrend Technology Inc Using lt gt as the package base directory Processing package information Processing system information 5 package pathnames space requirements Verifying disk space requirements Checking for conflicts with packages already installed Checking
18. are Reference Manual These documents are located in the product CD included with each subsystem package Limitations e One logical configuration e g a logical drive can be associated with up to 32 I O paths EonPath User s Manual Section One Overview This document covers general configuration concerns options and work theories for using the EonPath multipathing drivers The document covers the EonPath drivers for three major groups of operating systems including Solaris Windows and Linux The major functionalities of the EonPath is to direct I Os to an alternate data path in the event of HBA or cabling failure mending the weakest point of storage configuration by far The EonPath also comes with load balancing algorithms which help accelerate the throughput across host storage data links Unlike complicated volume management software by 3rd party vendors the EonPath is simple and features an end to end association between storage devices and HBAs across a storage network This reduces the risk of conflicting device identifiers often occurred with 3rd party software A storage device e g a logical drive appears to the EonPath through Infortrend s proprietary identifying methods and thus the configuration is effortless Design Purposes and Benefits e Path redundancy with automatic failover failback e Reduces the dependability on FC switches through fault tolerant links e Load balance compliant with
19. atis Device Total Read KB s Total Write KB s dev ift_md0a 3540 11342 Idev ift mdOb 1756 6242 Device Total Read KB s Total Write KB s dev ift_md0a 5266 12650 Idev ift mdOb 2316 6216 Device Total Read KB s Total Write KB s EonPath Multipathing Package for Linux 49 EonPath User s Manual mme sees esse ss S lsl0se SS Sa SS SS SS SS SS SSS dev ift_md0a 5564 16534 dev ift_md0Ob 2510 7425 Press Enter to Stop Version Displays the revision number of the EonPath driver EonPath gt gt version EonPath version 1 05 x86 EonPath driver version 1 05 RedHat Enterprise Linux AS3 0 i686 help Displays all available functions quit Exits the current configuration console Configuration Change Concerns If the need arises for a configuration change connecting different host ports etc reboot the system and use EonPath commands such as make md and add path to activate the new connection Uninstalling EonPath Packages 1 Stop host application I Os 2 Locate the UNINSTALL command file in folder where the package files reside to uninstall the EonPath package The uninstallation details should appear like the following root localhost mpio_1 09 UNINSTALL uninstall config mpio uninstall lib modules 2 4 21 4 ELsmp kernel drivers mpio uninstall device nodes uninstall rc modules 50
20. ddress or DNS name and socket number of the portal you want to add Click Advanced to select specific settings for the discovery session to the portal IP address or DNS name Socket 2260 Advanced cea EonPath MPIO for Windows 29 EonPath User s Manual N NOTE You can check your iSCSI ports IP addresses using the RS 232 terminal connection or the RAIDWatch Manager software Please refer to the firmware Operation Manual or RAIDWatch User s Manual that came with your subsystem for more information N NOTE Windows will automatically generate a socket number that is shown on the right of the IP address input box It is recommended you keep the socket number without changing it Step 4 To create path redundancy repeat Step 3 above to add one or more target portals Step 5 Click on the Targets tab on the iSCSI Initiator program window and then click on the Log On button iSCSI Initiator Properties E xj General Discovery Targets Persistent Targets Bound Volumes Devices Select a target and click Log On to access the storage devices for that target Click details to see information about the sessions connections and devices for that target Targets ign 1996 04 com bosch raid sn 97213 00 Connected iqn 1936 04 com bosch raid sn737213 10 Connected Details Log On Refresh TN Step 6 The Log On to Target window should prompt Click on both c
21. ency if module failures should occur For example disabling the use of buffers on individual disk drives may let you lose some performance yet it is relatively safer for drive buffers may hold cached writes during a power outage and cause data inconsistency The configuration option can be found in firmware s embedded utility through Main Menu gt View and Edit Configuration Parameters gt Drive side Parameters gt Drive Delayed Write There are similar concerns with the mirrored cache operated between the RAID controllers Make sure compensatory measures are applied e g use of battery backup modules or UPS devices Storage side Configuration EonPath User s Manual Pros and Cons of Various Configurations 1 Simple DAS DAS at its simplest form using a single controller subsystem Simple DAS w o Hub Applies to single logical drive over flexible cabling DAS to Dual ported HBAs Dedicated data paths and high performance to a single server 4 DAS w Hubbed Ports Saves costs on FC switches total host side bandwidth can be halved 5 SAN w FC Switches Applies to multi server SAN requires external FC switches 6 SAN w FW 3 48 Mapping Arrays can be associated with Controller A or Method Controller B IDs In the event of host link failure data access travels through the alternate path to the alternate RAID controller EonPath User s Manual 1 Simple DAS Single controller Subsystem C
22. er s Manual Server MPIO I AN Bo P FC ID 113 LUNO FC ID 113 LUNO FC ID 113 LUNO FC ID 112 LUNO Logical Association LD ID 2099037 2 LDO 2D99C368 Cm TR RAID Subsystem Figure 2 1 Multipath Disk Device Logical Association 2 The physical data path devices can be found under the SCSI and RAID Controllers category under which a Multi Path Support simulated device and the two installed HBA Adapters should be found 3 For the configuration using iSCSI RAID the physical data path devices can be found under the Network Adapters category Physical network devices such as Ethernet NICs or iSCSI adapters can be found here If your iSCSI network is operated through Microsoft iSCSI Initiator both the Microsoft iSCSI initiator and Multi path Support simulated devices should be found under the SCSI and RAID Controllers category iSCSI Component Check Approach 4 If your iSCSI operation is managed by Microsoft iSCSI software initiator you can verify the installed components by accessing the properties screen of the initiator program Click on the Targets or Persistent Targets tab to check the status of the connected storage device If the multipathing program has been successfully initiated the target status will change from Inactive to Connected When dealing with newly installed components you need to manually Add the iSCSI ports through the Discovery tabbed window Note that the Target portals here ref
23. er to the iSCSI ports on your iSCSI RAID subsystem EonPath MPIO for Windows 27 EonPath User s Manual ISCSI Initiator Properties i E x General Discovery Targets Persistent Targets Bound Volumes Devices Select a target and click Log On to access the storage devices for that target Click details to see information about the sessions connections and devices for that target Targets ign 1996 04 com bosch raid sn 9721 3 00 Connected ign 1996 04 com bosch raid sn737213 10 Connected Details Log On Refresh Cancel Microsoft iSCSI Initiator 5 Microsoft iSCSI Initiator Installation The following paragraphs introduce the Microsoft iSCSI Initiator software and its installation process Depending on the iSCSI HBA cards used in an iSCSI network the iSCSI initiator software installation maybe required Please consult your HBA card vendor or refer to the documentation that came with your HBAs Microsoft iSCSI Initiator software also facilitates the use of standard Ethernet cards to build up an iSCSI networked storage In installations without dedicated iSCSI HBA cards it is important to install the iSCSI initiator software Microsoft iSCSI Initiator Download The Microsoft iSCSI Initiator program version 2 0 can be downloaded from Microsoft s official website The link is shown below http www microsoft com downloads filelist Three Initiator program files are available for Windows running on d
24. eseeeecseseeecseeeeeeeseeeeseaeeecsenaeees 10 1 Simple DAS Single controller Subsystem eee 11 2 Simple DAS Onboard Hub Disabled FW3 48 Mapping Method 12 3 DAS to Dual ported HBAs Onboard Hub Disabled se 13 4 DAS with Hubbed Ports Onboard Hub Enabled e 15 5 SAN with FC Switches Onboard Hub Disabled sss 16 6 SAN with FC Switches FW3 48 Mapping Method Onboard Hub Disabled 18 Section Three EonPath MPIO for Windows e eren ee eene eene eee ee ee eese 20 WINDOWS MPIO OVERVIEW ccccccceceesssseceeececsessaececececseseaeseeeceesensaesesececeeseasaeeeeeesessaeaeees 20 SUPPORTED HARDWARE ceeeeeeeeere nennen enne enne rennen rennen sr ee tens sene rese innen n seen rennen nennen nnns 20 SUPPORTED OS M 20 INSTALLATION PREREQUISITES c cccssssscecsssceeeessececsssaececseseecesaeeecsesaeeeceeeeeeessaeeeeseaeessseeaeens 20 Environmental Prerequisites ees eese nennen 20 Hardware Prerequisites esee ener 21 THE EONPATH MPIO PROGRAM PACKAGE eene eene enne en nennen enne en nennen nennen 22 MPIO DRIVER INSTALLATION eese ener eene rennen seen tener innen rin ne nnns enter seen nn nnne 22 KNOWN ISSUES RR 24 UNINSTALLING MPIO PROGRAM ccsessscecececsesssececececcessueceeececsesseaeeesececeeseaeaeeecessessanaeees 25 METHODS TO CHEC
25. ess Step 4 Restart computer The MPIO driver installation will be completed after a system reboot A note If you should need to remove the MPIO driver program in the future the uninstallation will also take effect after a system reboot Step 5 The MPIO driver program is successfully installed onto your host computer Your storage system is now protected by the multi path load balance and failover functionalities EonPath MPIO for Windows 23 EonPath User s Manual Known Issues 1 If RAID configurations have been deleted and created you need to uninstall and reinstall the EonPath software The EonPath software recognizes RAID configurations by a random device ID generated by firmware A re configured array will appear with a different ID and hence the software needs to be re installed 2 Ifthe need arises to change host LUN mapping i e associate a logical drive with different host ID LUNs you need to stop host application I Os uninstall the EonPath program reboot the host computer configure RAID array LUN mapping and then re install the EonPath program for the new configuration to take effect Stop host I Os Check complete removal of Uninstall EonPath EonPath modules i Reboot LUN mapping change RAID firmware Re install EonPath Reboot 3 Make sure the EonPath is completely removed if you want to make changes to LUN mapping In Windows you can check Computer Management D
26. evice Manager check Disk drives and the SCSI and RAID controller items Make sure items such as Multi path device have been removed O Computer tanagement d te an yen Window teb Cni DB 70 2 3 Computer Management Local Shared Folder s B ME Local Users and Groups Performance Logs ard Alert Reno able Show ape Cash Dah agent ev Dsk Management gla Sereces and Apo ators xa HAN E oW Computer op Oh drives ap FT 512951420 SCH Ok Device ap 15129 51420 KN Ow Deve ap STORI TAS M Owpuny adapters 2p OVOKCD ROM drives FI roov deb controllers E Jj Peony de drives XX ATAJATAPT controllers oU Keyboards j Mice and other panting devices 4 Morosoft Seal Mouse FYRE Compatible Mouse a WM Motors E p tori adapters x KS and RAID controllers Mcrosolt GCS ator MrPerh Support Quog Fibre Chanel Adapter hog Fibee Channel Adapter EO Sound deo ard game controllers M System devices At Fined Feature Banen 4 ADI Power button ME Drect memory access controller z 24 EonPath User s Manual Uninstalling MPIO Program To remove the MPIO program from Windows you can locate and execute an execution file uninstall exe under the sub folder Windows x64 or Windows xX86 of the product CD that came with your subsystem Select the file in the correct sub folder according to your Windows OS Restart your system after the MPIO program is successfully uninstalled
27. for setuid setgid programs EL Step 4 When prompted by a confirmation message press y to proceed This package contains scripts which will be executed with super user permission during the process of installing this package Do you want to continue with the installation of lt EonPath gt y n y Step 5 The messages displayed during installation should look like this Installing EonPath Infortrend multipath package as lt EonPath gt Installing part 1 of 1 EonPath Multipathing Package for Solaris 35 EonPath User s Manual Step 6 Step 7 kernel drv iftmd conf kernel drv sparcv9 iftmd usr bin EonPath Verifying class Executing postinstall script Installation of lt EonPath gt successful The default location of an installed package is shown below You may then execute the package bash 2 05b cd usr bin bash 2 05b EonPath NOTE n Solaris 9 requires you to execute the following command to manually mount the UFS file system SM Mount o logging dev dsk lt cxtxdxsx gt lt mountpoint gt Similar file system will be automatically mounted in Solaris 10 Type help to display all configuration commands You should then proceed with configuring multipathing devices EonPath gt gt help listlun for listing current IFT LUNs listmd for listing current multipath devices detail md for displaying details of multipath devices make md
28. g 1 The new mapping method allows a logical drive to be associated with IDs assigned to different RAID controllers Associated with both Controller A and Controller B IDs firmware can dynamically re arrange I O load on different I O paths when a specific I O path is congested with heavy load This works with TPGS methodology which obtains I O load statistics from Infortrend s multipathing drivers running on the host side Logical drives are separately associated with a Controller A ID and a Controller B ID on the same host channel In the event of a cabling or single controller failure a surviving controller or a controller holding a valid data link can access the array through the inherited host IDs Through the intermediate FC switches or a FC switch with segregated zoning cable controller failure can be managed by re routing host I Os to a valid link Host IDs managed by a failed controller are automatically passed down a surviving RAID controller for instance Controller A IDs passed down to Controller B in the event of controller failure Shown above is a configuration using FC switches to facilitate the connections with multiple SAN servers For the reason with the diagram s simplicity only one server is displayed here When using FC switches the subsystem s onboard hub functionality should be disabled Storage side Configuration EonPath User s Manual Section Three EonPath MPIO for Windows Windows MPIO
29. he traditional mapping method which allows a logical drive to be associated with IDs managed by a single RAID controller e g either Storage side Configuration EonPath User s Manual Controller A IDs or Controller B ID The new mapping method available since firmware 3 48 allows a logical drive to be managed by both counterpart controllers i e a logical drive associated with both Controller A and Controller B ID This configuration applies to a redundant controller subsystem which is attached to a host computer equipped with two dual ported host adapters Multipathing is achieved through the following 1 Logical drives are separately associated with Controller A IDs or Controller B IDs on separate host channels In the event of a cabling or single controller failure a surviving controller or a controller holding a valid data link can access the array through an alternate host ID that was originally managed by the counterpart controller Cable controller failure can be managed by EonPath by re routing host I Os to a valid link Host IDs managed by a failed controller are automatically passed down to a surviving RAID controller for instance Controller A IDs passed down to Controller B in the event of controller failure In this configuration the subsystem s onboard hub functionality is disabled EonPath User s Manual 4 DAS with Hubbed Ports Onboard Hub Enabled Server LD to Host ID Logical
30. heck boxes to enable the connections to be restored automatically when the system reboots and the support for multi path connection Click OK to exit this window 30 EonPath User s Manual Log On to Target Step 7 Return to the iSCSI Initiator Properties window Click OK to exit the program iSCSI Initiator Properties ign 1335 04 com bosch raid sn 73721 3 00 Connected iqn 1996 04 com bosch raid sn797213 10 Connected Step 8 On the Windows desktop right click on the My Computer icon and then select the Manage option A Computer Management window will be opened My Manage EonPath MPIO for Windows 31 EonPath User s Manual Step 9 Click on the Device Manager on the tree table located on the left side of the Computer Management window The EonStor RAID volumes should be present and the Microsoft iSCSI Initiator program should be listed sf Computer Sar Disk drives Se IFT AI2E G2121 2 SCSI Disk Device F fd Display adapters Floppy disk controllers J Floppy disk drives IDE ATA ATAPI controllers we anha svede 2 GA dg Network adapters Hg 3Com 3C996B Gigabit Server NIC BB 3Com 3C996B Gigabit Server NIC 2 B Intel R PRO 100 Server Adapter PILA8470B E9 Intel R PRO 100 Server Adapter PILA8470B 2 1 Y Ports COM amp LPT la nd RAID Oy Sound video and gametontrollers ig System de
31. ifferent platforms Choose the program that is most appropriate for you The example shown in the following sections is based on iSCSI 2 0 x86fre exe Installing the iSCSI Initiator Double click on the iSCSI 2 0 x86fre exe and then follow the on screen instructions by its install shield wizard Installation completes within a few minutes 28 EonPath User s Manual iSCSI Initiator Configuration Once successfully installed you may access the Microsoft iSCSI Initiator program by double clicking the associated desktop icon or the same icon through the Start menu In iSCSI applications using standard Ethernet cards the associated iSCSI parameters must be correctly configured before the MPIO software is installed Step 1 Double click on the icon to open the initiator program window Microsoft Step 2 When opened click on the Discovery tab and then click on the Add button to add new target portals iSCSI Initiator Properties xi General Discovery Targets Persistent Targets Bound Volumes Devices r Target Portals Address Pot Adapter IP Address 10 11 12 13 3260 Default Default 10 11 12 12 3260 Default Default Add Remove Refresh F ISNS Servers Name o O Add Remove Refresh Step 3 When the Add Target Portal window prompts enter the IP or host name of the iSCSI host port of your RAID subsystem Click OK to proceed Add Target Portal 7 x Type the IP a
32. limits of finite resources set for traditional SCSI host LUNs the EonPath has effectively managed queue depths which help boost data path performance Section Two EonPath User s Manual Storage side Configuration Design Concerns 1 We assume that EonPath drivers are implemented for an environment running mission critical applications and that the Infortrend storage subsystems applied in such environment should also come with high availability i e dual redundant RAID controllers On the host side a redundant pair of single ported HBA is necessary Carefully configure your RAID arrays and select the appropriate array settings such as stripe size and write policy Reconfiguration takes time and may require you to move your data Perform the similar tasks if your RAID arrays come with a more complicated mapping scheme e g volumes divided into many partitions multiple array volumes etc Create at least two logical drives LDO and LD1 and associate map them equally with Controller A IDs AID and Controller B IDs BID Doing so you get the maximum work power from the dual redundant RAID controllers For more details on creating AIDs BIDs and LUN mapping processes please refer to Infortrend s Generic Operation manual Logical arrays are assigned to Controller A by default Logical arrays should be manually associated with Controller B IDs Disable some configuration options for they might cause data inconsist
33. monitor I O flow specific to Infortrend s RAID storage 4 The commands for configuring multi path load balancing redistribution The EonPath package aims to help you achieve the following 1 End to end Path Failover With redundant physical path components HBAs cables and switches between the server and storage failover algorithms and the OS based device aware drivers the weakest point of today s storage configuration can be mended 2 Transparent Recovery of a broken path Third party failover software often causes configuration difficulties and compatibility issues among multi vendor components in a storage configuration The Block Device Driver in this package insulates and manages hardware components on behalf of the operating system The configuration efforts and the chance of encountering interoperability problems can be reduced 3 Native support for I O load balancing in tiered multi vendor storage configurations This package provides a means for Infortrend s load balancing algorithms to operate at its best The firmware algorithms appear as the device module containing non generic and vendor specific characteristics supported by Solaris and Linux operating systems EonPath Multipathing Package for Solaris 33 EonPath User s Manual Supported Hardware The EonPath driver program is designed to use with ASIC266 or ASIC400 based EonStor Fibre to Fibre Fibre to SATA and SAS series RAID subsystems o
34. n difficulties and compatibility issues among multi vendor components in a storage configuration The device driver in this package insulates and manages hardware components on behalf of the operating system The configuration efforts and the chance of encountering interoperability problems can be reduced Native support for I O load balancing in tiered multi vendor storage configurations This package provides a means for Infortrend s load balancing algorithms to operate at its best The firmware algorithms appear as the device module containing non generic and vendor specific characteristics supported by Solaris and Linux operating systems EonPath Multipathing Package for Linux 43 EonPath User s Manual Supported Hardware The EonPath driver program is designed for use with ASIC266 or ASIC400 based EonStor Fibre to Fibre Fibre to SATA and SAS series RAID subsystems or Fibre to Fibre controller heads Supported OS Please refer to the readme file that came with your EonPath package for details about supported kernels Installation Prerequisites Environmental Prerequisites The host computers must have at least two 2 connections to the RAID storage and EonPath software installed to create and manage the connections in a manner consistent with the operating system If installed in a Fibre Channel SAN environment it is preferred to route the FC links through redundant high bandwidth FC network switches with the
35. ndant path access This configuration applies to a redundant controller subsystem which is directly attached to a host computer without intermediate networking devices A logical drive is associated with different Controller IDs Controller A and Controller B on separate host channels of different RAID controllers Ny NOTE You may use different channel IDs than are shown here in the sample topologies IDs used in the sample configurations are mostly default numbers in firmware As long as the IDs are carefully selected according to the configuration rules there is no limitation on selecting different host channel IDs 12 EonPath User s Manual 3 DAS to Dual ported HBAs Onboard Hub Disabled Server by I I gt SJ Dual ported N EonPath Multipathing LD to Host ID Logical Association CHO AID 112 CHO BID 113 CH1 AID 112 CH1 BID 113 LD Logical Drive AID ID Managed by Controller A BID ID Managed by Controller B RAID Subsystem Figure 4 DAS to Dual ported HBAs and Traditional Mapping Method Configuration Tasks Map LDO to an AID on 0 0 112 N A channel 0 Map LDO to an AID on LDO 0 1 112 N A channel 1 for redundant path access Map LD1 to a BID on 0 0 N A 113 channel 0 Map LD1 to a BID on LD1 0 1 N A 113 channel 1 for redundant path access N NOTE 7 The mapping information here is following t
36. not limited to indirect special incidental consequential or other damages Infortrend reserves the right to make changes to the software at any tine without notice Brands product names and website address herein are trademarks or registered trademarks of the espective owners If you have problems with this software please visit our website at www infortrend com tw or contact our technical support team at http www infortrend com support By loading or using the software you agree to the above disclaimer Wes No lt Y Nd gt hd Step 3 If you agree the terms and conditions listed type Y and then click Enter on the keyboard to install the program onto your host computer A DOS screen will appear during the installation process The DOS screen will automatically close once the installation is completed It will take approximately a few seconds ai i are ple t our website at wuw infortrend com tw or contact our technical support team at http www infortrend com support By loading or using the software you agree to the above disclaimer Nes NoC Y N5 the Multi Path fidapter Filter Multi Path Bus Driver Installing the Device Specific Module Success Installing the Multi Path Device Driver Success Restarting all SCSI adapters Success t restart this computer for the changes to take effect Enter Key to exit Shown above is a DOS screen displayed during MPIO driver installation proc
37. nssececececsensaeceeececseseseaeeeceesensnseaeees 43 SUPPORTED HARDWARE errrrrrerrennnnrrrnsnrsnensnnrnrnsnssrensnnrnnnensseenennnnrsenssnesennnnrsensnssnensnnrnensssssenene SUPPORTED OS pre INSTALLATION PREREQUISITES ccccessssssceccceceessseceeccecsensaececeeecseneseceeececsenesssseeeeecseneneaeees Environmental Prerequisites eee esee ette trennen eene eren Hardware Prerequisites esee eren nre ens INSTALEATION sine eid EIE REUS CONFIGURATION COMMANDS eese enne nennen nenne nr nien ettet nsns essen eite snas esee tete enses CONFIGURATION CHANGE CONCERNS UNINSTALLING EONPATH PACKAGES EonPath User s Manual About This Manual This manual e Introduces the multipath I O driver package e Provides details about the EonPath package installation process e Describes the EonPath configuration commands This manual does not e Contain detailed information on RAID configurations e Give a detailed description of the hardware devices and their connections Who should read this manual This document is intended for system administrators who want to install the EonPath packages for building a multipathing solution in a storage network using Infortrend s EonStor series RAID subsystems or EonRAID series RAID controller head Related Documentation Generic Operation Manual Version 1 69 or later revisions RAIDWatch User s Manual Version 2 2 or later revisions Installation and Hardw
38. oard Hub Disabled LD to Host ID Logical Association ND Gue CHO AID 112 CHO BID 113 CH1 AID 112 CHO BID 113 LD Logical Drive Server 5 j HBA 1 HBA 0 3 3 EonPath Multipathing qim switcn 1 AID 112 Pl ole AID ID Managed by Controller A BID 113 EG BID ID Managed by Controller B RAID Subsystem Figure 6 SAN with FC Switches Shown above is a configuration using FC switches to facilitate the connections with multiple SAN servers For simplicity only one server is displayed Many can be attached to the FC switches 16 sj ds E Tasks EonPath User s Manual Map LDO to an AID on 0 0 112 N A channel 0 Map LDO to an AID on LDO 0 1 112 N A channel 1 for redundant path access Map LD1 to a BID on 0 0 N A 113 channel 0 Map LD1 to a BID on LD1 0 1 N A 113 channel 1 for redundant path access This configuration applies to a redundant controller subsystem attached to host computer s using intermediate FC switch devices Fault Tolerance is achieved through the following 1 Logical drives are separately associated with Controller A IDs or Controller B IDs on separate host channels In the event of a cabling or single controller failure a surviving controller or a controller holding a valid data link can access the array through an alternate host ID Through the intermediate FC switches or a FC switch with segrega
39. ously installed MPIO program on the host computer s we strongly recommend that you remove the MPIO program and restart the computer before performing the Infortrend MPIO driver program installation Install the MPIO program without uninstalling the previous version may cause unexpected system faults To install EonPath MPIO follow these steps Step 1 Double click on the installer file install exe to start the installation process Step 2 A Licenses Announcement window will appear Read the announcement carefully 22 EonPath User s Manual ex CADOCUME 1VOHN OCALS 1 Temp Rar EX03 687 infortrend 86 install exe laf xl PLEASE CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS IBEFORE YOU USE OR LOAD THIS SOFTWARE H This driver software is created by Infortrend and is provided AS IS and Infor d cautions users to determine for themselves the suitability of the v on of this software Infor d disclaim any express or implied warranty relating to sale and or use of Infortrend products including liability or warranti relating to fitness for a particular purpose merchantability or inf ringement of any patent copyright or other intellectual property right Infortrend assume no responsibility for loss of use loss of data malfunction or damage to your equipment arising from the installation or use of this software and shall in no event be liable for any loss of profit or any other commercial damage including but
40. paths are combined as fault tolerant partners 1 Mini_Queue I O requests equally shared by detecting and directing I Os to a path carrying lower traffic 2 Round_Robin I Os are dynamically assigned to I O paths in turn according to the I O load 3 Vendor Spec Factory reserved Example bash 3 00 EonPath EonPath gt gt set Ib ldx Device Device S N Paths Size 0 dev dsk c188t188d150 0x00012354EB30B600 2 4096 MB Select Multipath Device Index Input 1 for Cancel 0 Select Load Balance Mode 0 Fail Over 1 Mini Queue 2 Round Robin 3 Vendor Spec Input 1 for Cancel 1 0 EonPath Set device load balance policy success for dev dsk c6t115d0s0 EonPath Multipathing Package for Solaris 39 EonPath User s Manual stat This allows you to monitor the on going I Os traveling through the existing I O paths Example EonPath gt gt stat Device Total Read KB s Total Write KB s Idev dsk c179t179d1s0 3540 11342 0 dev dsk c4t112d0s0 1756 6242 Device Total Read KB s Total Write KB s dev dsk c179t179d1s0 5266 12650 0 dev dsk c4t112d0s0 2316 6216 Device Total Read KB s Total Write KB s dev dsk c179t179d1s0 5564 16534 0 dev dsk c4t112d0s0 2510 7425 Device Total Read KB s Total Write KB s dev dsk c179t179d1s0 7651 12210 0 dev dsk c4t112d0s0 1724 6424 Press Enter to Stop Version Displays the revision number of the EonPath driver EonPath gt gt version Version EonPath Disk Driver 1 0 5
41. r Fibre to Fibre controller heads Supported OS Solaris comes with various OS revisions please refer to the readme file that came with your EonPath package for details about the supported versions Installation Prerequisites Environmental Prerequisites The host computers must have at least two 2 connections to the network and EonPath software installed to create and manage the connections in a manner consistent with the operating system If installed in a Fibre Channel SAN environment it is preferred to route the FC links through redundant high bandwidth FC network switches with the same intelligent failover mechanisms to eliminate single point of failure If you are using the EonStor series RAID subsystems that come with Fibre Channel host ports or the EonRAID 2510FS controller heads the Fibre HBA cards and its driver should be installed to the host computer s prior to EonPath program installation Firmware version 3 47x or above must be running on your RAID subsystem Hardware Prerequisites The EonPath program aims to eliminate every single point of failure for high availability environments Therefore it is preferred your storage subsystems also come with fully redundant and hot swappable modules e g EonStor models that come with dual redundant RAID controllers To create path redundancy in a Fibre Channel storage network or applications using other host side links apply at least two 2 single ported HBA c
42. s Floppy disk controllers I Floppy disk drives G IDE ATA ATAPI controllers gt Keyboards Mice end other pointing devices 4 D Processo ga SCSI and RAID controllers CS Multi Path Support QLogic Fibre Channel Adapter QLogic Fibre Channel Adapter rollers Check the following items 1 Click the Disk drives type icon to display one or more multi path disk device s and mapped LUNs The LUNs available through separate host links and the Multi path Disk Devices will be displayed together That is because an individual RAID volume can be associated with two different ID LUNs on two different host data paths channels The example here uses a single host computer to connect the EonStor A16F R2221 RAID subsystem The connection with an ISCSI subsystem will be similar to this regardless of the interconnecting networking devices Two 2 RAID volumes two logical drives were created and associated with four 4 channel ID LUNs on the two 2 data paths connecting the host computer Each configured RAID volume logical drive is designated by a unique serial identifier randomly and automatically generated by the RAID controller No matter the RAID volume is associated with how many host ID LUNs on how many data paths MPIO recognizes this identifier and considers the RAID volume as a Multipath Disk Device I Os can be directed through different host ID LUNs associated with a Multipath Disk Device 26 EonPath Us
43. s Active or Passive I O route Example EonPath gt gt set disk Idx Device LUN_SN Paths Size 0 dev ift md0a 0x0A11145E7E8A0300 2 4400 MB 48 EonPath User s Manual Select Multipath Device Index Input 1 for Cancel 0 0 Multipath Device dev ift mdOa Path List Idx Device LUN SN HBA ID State 0 dev sda 0x0A11145E7E8A0300 0 Ok 1 dev sdb 0x0A21145E7E8A0300 1 Ok Select Path Index Input 1 for Cancel 0 0 Set Path State to 0 Active 1 Standby Ok Input 1 for Cancel 0 0 EonPath Set device state success for dev ift_md0a set Ib Specifies a load balancing policy for your multipathing configuration The configurable options are 0 Fail_Over two I O paths are combined as fault tolerant partners 1 Mini_Queue I O requests equally shared by detecting and directing I Os to a path carrying lower traffic 2 Round Robin I Os are dynamically assigned to I O paths in turn according to the I O load 3 Vendor Spec Factory reserved Example EonPath gt gt set Ib Idx Device LUN SN Paths Size 0 dev ift md0a 0x0A11145E7E8A0300 2 4400 MB Select Multipath Device Index Input 1 for Cancel 0 0 Select Queue Transfer Mode current 0 0 Round_Robin 1 Mini_Queue 0 Input 1 for Cancel 1 0 EonPath Set device queue load balance success for dev ift_md0a statis This allows you to monitor the on going I Os traveling through the existing I O paths Example EonPath gt gt st
44. subsystems also come with fully redundant and hot swappable modules n To create path redundancy in a Fibre Channel storage network or applications using other host side links apply at least two 2 single ported HBA cards or two 2 dual ported Fibre Channel or iSCSI initiator HBA cards for models featuring more than dual host ports on the host computer s n Before installing and using the MPIO program RAID volumes must be created and properly associated with host ID LUNs for using the MPIO functions J NOTE For logical drive creation LUN mapping and Firmware configuration please refer to the RAIDWatch User s Manual or firmware Operation Manual that came with your RAID subsystem EonPath MPIO for Windows 21 EonPath User s Manual The EonPath MPIO Program Package The MPIO program package comes as a zip file and is available through Infortrend s e support websites Download the zip file and extract its contents The following file folders for different Windows platforms should be available 1 Windows x86 edition 2 Windows X64 edition Select one of the installer programs from a folder that is appropriate for your OS and host computer s MPIO Driver Installation Before you install the MPIO driver program make sure your computer system meets the requirements previously listed It is recommended that you close all running applications before running the installer program AN CAUTION If you have a previ
45. ted zoning cable controller failure can be managed by re routing host I Os through a valid link Host IDs managed by a failed controller are automatically passed down a surviving RAID controller for instance Controller A IDs passed down to Controller B in the event of controller failure When using FC switches the subsystem s onboard hub functionality should be disabled Storage side Configuration EonPath User s Manual 6 SAN with FC Switches FW3 48 Mapping Method Onboard Hub Disabled LD to Host ID Logical Association CHO AID 112 d CHO BID 113 CH1 AID 112 S DA CH1 BID 113 LD Logical Drive AID ID Managed by Controller A BID ID Managed by Controller B RAID Subsystem EonPath Multipathing Switch 0 5 m Switch 1 AID 112 BID 113 Figure 7 SAN with FC Switches amp FW3 48 Mapping Method Configuration Map LDO to an AID on 0 0 112 N A Tasks channel 0 Map LDO to a BID on LDO 0 0 N A 113 channel 0 for redundant path access Map LD1 to an AID on 0 1 112 N A channel 1 Map LD1 to a BID on LD1 0 1 N A 113 channel 1 for redundant path access 18 EonPath User s Manual This configuration applies to a redundant controller subsystem which is attached to a host computer with intermediate FC switch devices The new mapping method requires firmware revision 3 48 or later Fault Tolerance is achieved through the followin
46. the multipathing configuration target Example EonPath gt gt detail md Idx Device LUN_SN Paths Size 0 dev ift_md0a 0x0A11145E7E8A0300 2 4400 MB Select Multipath Device Index Input 1 for Cancel 0 0 Multipath Device dev ift mdOa Paths List EonPath Multipathing Package for Linux 47 EonPath User s Manual LoadBalance Mode Mini Queue Idx Device LUN_SN HBA ID State 0 dev sda 0x0A11145E7E8A0300 0 Ok 1 dev sdb 0x0A21145E7E8A0300 1 Ok make md This command selects a specific RAID volume into Multipath device configuration Example EonPath gt gt make md Idx Device LUN_SN Paths 0 N A 0x0A11145E7E8A0300 2 Select Multipath Device Index Input 1 for Cancel 0 0 EonPath Device dev ift mdOa device create successful del md Disassociate a RAID volume from the multipathing configuration scheme add path Combines an additional I O path with an existing RAID volume making it the alternate I O route for data path redundancy EonPath gt gt add path Idx Device LUN_SN Paths Size oO Ideviift md0a 0x0A11145E7E8A0300 2 4400 MB Select Multipath Device Index Input 1 for Cancel 0 0 Idx Device LUN_SN HBA_ID State NN Idevisdc 0x210100E08B2AADE1 0 Ok Select Path Device Index Input 1 for Cancel 0 O EonPath Device dev ift md0a add path successful remove path Disassociate a configured I O path from an existing RAID volume set disk Specifies specific I O paths a
47. v lt shared pathname not removed gt kernel lt shared pathname not removed gt etc EonPath conf etc lt shared pathname not removed gt Updating system information Removal of lt EonPath gt was successful EonPath Multipathing Package for Solaris 41 EonPath User s Manual This page is intentionally left blank 42 EonPath User s Manual Section Five EonPath Multipathing Package for Linux EonPath Linux Package Overview The EonPath package consists of device drivers and configuration commands that facilitate the configuration of multipathing storage solutions built around Linux based servers The major functionalities are 1 The device driver that acts as the device manager between Linux operating system and Infortrend s RAID storage Native without conflicting with other 3 party device drivers The commands to configure Path Redundancy The means to monitor I O flow specific to Infortrend s RAID storage The commands for configuring multi path load balancing redistribution The EonPath package aims to help you achieve the following 1 End to end Path Failover With redundant physical path components HBAs cables and switches between the server and storage failover algorithms and the OS based device aware drivers the weakest point of today s storage configuration can be mended Transparent Recovery of a broken path Third party failover software often causes configuratio
48. vices 1 Direct memory access controller gl ISAPNP Read Data Port P Microcode Update Device Ny NOTE Some HBA cards may provide a configuration utility and require configuring the corresponding iSCSI ports as well The configuration screen of an iSCSI HBA powered by IntelPRO 1000 IP Storage chipsets is shown below T Intel R PROSet for IP Storage xj Action Help a Adapters Intel PRO 1000 T IP Storage Adapter Intel PRO 1000 T IP Storage Adapter Initiator Name EB Initiator iqn 1991 05 com microsoft dvt jovi E gt raid sn797213 10 10 11 12 12 3260 Properties Statistics Initiator Me res x Select targets to add Target Name 10 11 12 13 iqn 1996 04 com bosch raid sn797213 00 Add J I I want to select the adapter to use for these targets Back Next gt Cancel 32 EonPath User s Manual Section Four EonPath Multipathing Package for Solaris EonPath Solaris Package Overview The EonPath package consists of Block Device Drivers and configuration commands that facilitate the configuration of multipathing storage solutions built around Solaris based servers The major functionalities are 1 The Block Device Driver that acts as the device manager between Solaris OS and Infortrend s RAID storage Native without conflicting with other 3 party device drivers 2 The commands to configure Path Redundancy The means to
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