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ATTO Express PCI Host Adapters Installation and Operation
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1. 3 Gb SATA II support 3 Gb SAS support Cable distances up to 8m up to 8m Integrated RAID 0 1 4 5 62 10 50 60 JBOD 0 1 4 5 62 10 50 602 JBOD DVRAID DVRAID RAID Management Utility Global Hot Spares Event notification E mail pop up log file E mail pop up log file Memory ECC 258 MB standard 258 MB standard 512 upgradeable OEM Advanced Data Streaming 512 upgradeable OEM Battery backup optional 32 bit support optional 64 bit support Windows Server 2008 2003 2000 Vista XP Linux Red Hat SUSE support Mac OS X support RoHS compliant Low profile t Performance ceiling constrained by PCle bus transfer speed Future support vi ATTO Technology Inc ExpressPCI Host Adapter Installation and Operation Manual Appendix D Standards and Compliances The equipment described in this manual generates and uses radio frequency energy The Technical Specification sheet for a particular ATTO ExpressPCl Host Adapter lists certifications for that model FCC standards radio and television interference Federal This equipment has been tested and found to comply with the limits for a Class USE A digital device pursuant to Part 15 of the FCC Rules These limits are designed Commission to provide reasonable protection against harmful interference in a residential installation This equipment generates uses
2. Appendix B Cabling and Termination Cables and devices must be chosen to maximize performance and minimize the electrical noise Use high quality Ultra 320 rated well insulated SCSI cables to ensure error free communications Cabling Cabling Total bus cable length varies by host adapter and type of attached devices See Exhibit A 2 for details on maximum cable length If you combine Wide 16 bit and Narrow 8 bit devices on the same connector connect the Wide devices first closest to the connector Refer to the documentation for your SCSI devices to determine if they are Wide or Narrow UltraWIDE SCSI Ultra2 SCSI Ultra160 or Ultra 320 Terminators Use an LVD terminator if you are only using LVD devices Although you can use a Single Ended terminator all devices will be limited to Ultra SCSI speeds Single Ended devices require a Single Ended terminator If you use an LVD terminator with Single Ended devices the system may hang or devices may not be seen on the SCSI bus Some termination manufacturers provide automatically sensing terminators External terminators should be attached to the last external device in the SCSI chain Don t use any other termination on the external SCSI chain The last device on an internal SCSI chain should also be terminated in one of several ways Many Single Ended Ultra SCSI and earlier devices provide a jumper setting for applying termination place a jumper over the pins designated
3. The process of devices negotiating for control of the bus with built in quiet times so that fast and legacy devices have an opportunity to take control of the bus A fair but somewhat inefficient process QAS speeds up the arbitration process by eliminating the bus free phase When combined with packetization reduces command overhead and maximizes bus use Minimizes data transfer overhead by allowing a target to send one data stream LQ packet followed by multiple data packets Minimizes overhead of data transfers because the target can send one data stream packet followed by multiple data packets The ultimate destination of data transmission a terminal device Small Computer Systems Interface a processor independent standard for system level interface between a computer and intelligent devices including hard disks floppy disks CD ROM printers scanners etc An electrical signal protocol that transmits information through changes in voltage Single ended SCSI uses standard TTL signal and ground pairs to transmit information over the SCSI bus SCSI is a parallel bus technology that is dependent on signals being transmitted on parallel wires simultaneously At higher speeds minute differences in wire lengths and transmission characteristics could cause problems Training pattern testing measures these minute differences and compensates for them ii ATTO Technology Inc ExpressPCI Host Adapter Installation and Operation Manual
4. correctly but occasional I O errors occur without proper termination If you use both internal and external connectors and mix Single Ended and LVD devices on the same bus even if using different connectors the host adapter card will operate with Single Ended signaling at UltraSCSI speeds Automatic termination When both internal and external connectors are used the host adapter card detects the presence of devices and turns off termination If devices are removed from one connector of the card the host adapter automatically detects the change and enables its own termination Software controlled termination You may have to override the host adapter s automatic termination if only narrow devices are attached to one connector and wide devices are attached to the other connector on the same bus The host adapter must supply partial termination to the upper 8 bits byte but not automatically Please refer to your ATTOI Utilities manual for instructions on setting the host adapter s termination to Upper Byte Termination power Host adapters supply termination power to the bus at all times and many SCSI devices are also able to supply termination power SCSI signal quality particularly with long or marginal quality cables may be improved if the device supplies the termination power Contact your device manufacturer for more information on your device s ability to supply termination power Exhibit A 1 Several inte
5. for termination on the last device on the internal cable Check with your drive manufacturer if you are not sure which pins to use LVD Ultra2 and Ultra160 SCSI devices cannot supply their own termination Use an internal ribbon cable which has a SCSI terminator attached to the end of it connect the unterminated end of the cable to the host adapter card and the internal drives to the subsequent connectors The terminator should be at the opposite end of the cable from the host adapter card and termination methods become important considerations The ExpressPCI Ultra320 SCSI Host Adapter supports two types of SCSI signaling Low Voltage Differential LVD and Single Ended Devices on the same SCSI bus must use the same signaling either LVD or Single Ended When setting up SCSI cabling consider the following points Wide 16 bit and Narrow 8 bit devices can be connected together on the same connector of the host adapter card but wide devices must be attached first followed by narrow devices To terminate the SCSI bus the cable or adapter used to convert from a wide 68 pin connector to a narrow 50 pin connector provides partial termination allowing upper 8 bits or byte of the wide SCSI bus to be properly terminated A narrow terminator should be used on the last narrow device to terminate the rest of the SCSI bus A SCSI bus without partial termination between the wide and narrow devices may at first appear to work
6. sec 400 MB sec 800 MB sec 400 MB sec Maximum Transfer Rate full duplex 2 Bisec 4 s GBSa en 800 MB sec 1GB sec 800 MB sec Bus Type PCle PCle PCle PCI X PCI X Bus Characteristics 8 lane 4 lane 4 lane Pea P Optical Interface SFP LC SFP LC SFP LC SFP LC SFP LC Maximum Cable Length aeolian Eee e Low Profile form factor ATTO Advanced Data Streaming ADS Technology Software RAID support 7 Developer s Kit Target Mode amp API Windows Server 2008 2003 2000 Vista XP support Linux Red Hat SUSE driver Mac OS X driver 7 Novell Netware support ES only Solaris support ES only d Free BSD ES only RoHS compliant 1 Performance ceiling is constrained by 133 MHz PCI X bus transfer speed 2 Backward compatible to 32 bit and 33 MHz PCI 3 ATTO ExpressStripe for OS X available Express Power Center and other software RAID supported for Windows ExpressSAS selection guide Product Features ATTO ExpressSAS RAID Adapters R348 R380 Max transfer rate full duplex 4 GB sec 4 GB sec x8 PCI Express g k Number of ports 8 8 Port configuration external internal 4 8 8 0 user selectable 4 4 or 0 8 Connector type 1 mini SAS x4 SFF 8088 external 2 mini SAS x4 SFF 8087 internal 2 mini SAS x4 SFF 8088 external Number of devices supported 64 SAS SATA targets 128 virtual devices 64 SAS SATA targets 128 virtual devices 1 5 Gb SATA support
7. to the applicable CE standards and found to be compliant The EPCI UL4D 0RO EPCI UL4S 0RO EPCI UL5D ORO and EPCI UL5D L00 cards comply with Directive 2002 95 EC on the Restriction of the Use of Hazardous Substances in Electrical RoHS and Electronic Equipment RoHS Contact your ATTO representative regarding ROHS COMPLIANT compliant products 2002 95 EC vii Appendix E Safety and Warranty All ATTO host adapter products have been tested to meet applicable safety standards when operated in proper electrical and thermal environments Safety Please review the specifications for your specific host adapter before installing and operating it in any computer system to ensure compatibility Installation Before installing an ATTO host adapter product into your computer system unplug the computer from its electrical power source and allow adequate time for electrical discharge and the internal components to cool down before removing the computer system cover This will decrease the risk of personal injury from electrical shock or touching the hot surface of an electrical component Once an ATTO host adapter is installed in a computer system the computer cover must be reinstalled properly before turning the computer system back on Operation ATTO host adapters require adequate cooling to function properly If you have any questions as to the airflow provided by your computer system please refer to your computer system manual or con
8. 320 Max transfer rate 640 MB sec 640 MB sec LVD 64 bit PCI 32 bit PCI 33 MHZ PCI 133 MHZ PCI X x4 PCle Bus ID support 30 30 Part number EPCI UL5D EPCI UL5D LP EPCI UL4D 2 ATTO Technology Inc ExpressPCI Host Adapter Installation and Operation Manual 2 Hardware Installation Install the ATTO ExpressPCI Ultra320 Host Adapter and attach your SCSI devices to it using the instructions below To get the best performance from your ATTO Express Ultra320 host adapters use Ultra 320 SCSI devices A CAUTION Remember to back up your system data before changing or installing hardware System requirements The ATTO ExpressPCl host adapter package contains the host adapter the ATTO ExpressPCI CD and a warranty and registration card If any items are missing contact your ATTO authorized sales representative To install and use the ATTO ExpressPC UL4DSCSI adapter you need A computer with an available 64 bit PCI X expansion slot preferred or a standard 32 or 64 bit PCI expansion slot e The complete ATTO ExpressPCI SCSI host adapter package To install and use the ATTO ExpressPCI UL5D and ExpressPCl UL5D LP you will need e Acomputer with an available x4 PCle expansion slot or larger such as x8 or x16 e The complete ATTO ExpressPCI SCSI host adapter package A CAUTION ATTO ExpressPCl host adapters contain components that are sensitive to electrostatic discharge ESD ESD can cause damage t
9. ATTO Technology Inc ATTO Express PCI Host Adapters Installation and Operation Manual ATTO ExpressPCl UL4D Dual channel Ultra320 SCSI PCI X host adapter ATTO ExpressPCl UL5D Dual channel Ultra320 SCSI PCle host adapter ATTO ExpressPCI UL5D LP Dual channel Ultra320 SCSI low profile PCle host adapter ATTO Technology Inc 155 CrossPoint Parkway Amherst New York 14068 USA www attotech com Tel 716 691 1999 Fax 716 691 9353 Sales support sls attotech com Technical support Monday Friday 8am 6pm EST techsupp attotech com Tel 716 691 1999 x242 2010 ATTO Technology Inc All rights reserved All brand or product names are trademarks of their respective holders No part of this manual may be reproduced in any form or by any means without the express written permission of ATTO Technology Inc 2 2010 PRMA 0325 000MD Contents 1 ATTO ExpressPCl Ultra320 SCSI Solutions 1 Ultra 320 SCSI features Common features ExpressPCI UL4D Host Adapter UL4D Host Adapter ExpressPCI UL5D UL5D LP Host Adapter UL5D Host Adapter UL5D LP Host Adapter ExpressPCI Ultra 320 Host Adapter selection guide 2 Hardware Installation 3 System requirements Installation 3 Installing and Updating Drivers Flash 5 Install from the Installation CD Windows OS X Linux Appendix A GIOSS Ary ccccccciecrectcencetces cerca eeekere ennari EEr aaae Eaa iaia i Appendix B Cabling and Termination cccccccseessseeeeeeeeeeeee
10. and Linux can be obtained from http java sun com javase downloads index j sp e The latest OS X build can be obtained through Software Update Java 1 5 is only available in 10 4 1 and later The ATTO Configuration Tool displays e The names of ATTO adapters installed in the system Information about the drivers controlling the adapters including version information for both the currently executing driver and the flash image Information about the devices attached to ATTO adapters You may also use the Configuration Tool to e Update the flash image when a new version is released by ATTO e Modify the NVRAM settings e Revert to default factory settings The factory settings on your ATTO host adapter should provide excellent performance for a wide range of applications However some applications may benefit from modification of the adapter NVRAM settings which tune the adapter for a specific performance range The ATTO Configuration Tool is included in the ATTO Utilities application on the Installation CD which came with your adapter Refer to the ATTO Utilities Installation and Operation Manual for complete information on installing and using the application 2 From the installation CD introductory screen click on Windows Applications 3 Click on Install ATTO Configuration Tool Launch the installer 5 Follow the on screen instructions until the installation completes A OS X 1 Check Software update to ensure the late
11. and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna Connect the equipment into an outlet on a circuit Increase the separation between the equipment different from that to which the receiver is and receiver connected e Consult the dealer or an experienced radio TV technician for help Canadian standards aly This Class A digital apparatus complies with Canadian ICES 003 i Cet appareil num rique de la classe A est conforme a la norme NMB 003 du Canada ra European standards Declaration of Conformity This following statement applies to the ATTO ExpressPCI Host Adapter This device has been tested in the basic operating configuration and found to be compliant with the following European Union standards Application of Council Directive 89 336 EEC Standard s to which conformity is declared EN55024 2002 EN55022 2002 CLASS B This Declaration will only be valid when this product is used in conjunction with other CE approved devices and when the entire system is tested
12. ductivity and efficiency Instead of using the RAID functionality built into Windows OS use the ATTO Express PowerCenter Utility for the most efficient performance Contact your ATTO representative for more information Ultra 320 SCSI features e Double Transition Clocking e Domain Validation e Cyclic Redundancy Check CRC e Packetization e Quick Arbitration Select QAS e Free Running Clock e Read and Write Data Streaming e Flow Control e Training Pattern e Pre Compensation e Asynchronous Information Protection AIP Common features e Supports data transfer speeds of up to 320 MB sec per channel e Supports Ultra320 Specifications including e Packetized SCSI e Double transition clocking e Quick Arbitration Select QAS e Cyclical Redundancy Checking CRC e Domain Validation DV e Asynchronous Information Protection AIP e Free running clock e Flow control e Advanced Data Streaming ADS provides controlled acceleration of data transfers Embedded RISC processor for low overhead Bus mastering eliminates CPU processing time as a bottleneck e Tagged command queuing allows threads to be processed efficiently e Disconnect reconnect eliminates wait time between transfers e Optimized scatter gather lists e Backward compatible with legacy SCSI devices e ASPI Windows compatible e Automatic and upper byte termination e Flash ROM for easy field upgrades e RAID ready Environment and physical
13. eeeeeeeeeeeeeenaneeeeeeees iii Cabling Terminators Appendix C ATTO Product Guide cccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenaes v Appendix D Standards and Compliances s eeseeeeeeeeeeeeeeeeeeeeeeaeeeaeeeeeees vii Declaration of Conformity Appendix E Safety and Warranty cccccceseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeenenees viii Safety Installation Operation ATTO Technology Inc limited warranty 1 ATTO ExpressPCI Ultra320 SCSI Solutions The Ultra320 SCSI Host Adapter represents the seventh generation of SCSI technology an I O interface that is committed to increased performance while maintaining backward compatibility and legacy support Today s computing applications continue to strain the host PCI bus and storage subsystem To bring better performance and reliability to today s professional applications the ATTO ExpressPCI UL4D adapter delivers up to 640 MB sec data throughput and take advantage of the PCI X bus interface while the ExpressPCl ULSD delivers data throughput rates of up to 640 MB sec using the latest in PCI bus technology PCle ATTO ExpressPCI UL4D UL5D and ULSD LP adapters deliver the high bandwidth demanded in data intensive environments such as real time and high definition video editing web server and database engines To maximize your attached storage you may wish to use RAID a storage system using multiple disk drives to improve storage pro
14. er s you do not need to perform any of these procedures unless you are updating a previously installed driver After installing the ATTO ExpressPClI Host Adapter you must configure your system to recognize and use it by e installing drivers for your operating system updating the adapter firmware if necessary ATTO ExpressPCl adapters ship with the latest firmware installed If you are performing anew adapter installation you do not need to update the firmware If you are upgrading a previously installed driver update the adapter firmware to ensure proper operation using the ATTO Configuration Tool in the ATTO Utilities application The ATTO Configuration Tool is a utility program which displays information about installed adapters drivers and devices and provides a mechanism to configure installed adapters The ATTO Configuration Tool executes under e Windows Server 2008 2003 2000 Vista XP e Linux 2 4 Fibre Channel only and 2 6 kernels x86 and x64 e Mac OS X 10 4 x 10 5 x Install from the Installation CD The CD which comes with your adapter contains drivers for your adapters and the ATTO Configuration Tool included in the ATTO Utilities application Follow the instructions for your operating system Windows 1 Verify Java Virtual Machine Java version 1 5 or later is installed From the command line prompt type java version e Sun Java version 1 5 or later The latest runtime for Windows
15. iving end the difference between the two signals is measured and interpreted Noise on the bus will affect both the signal and its inverse equally so the difference between the two lines will remain the same and the noise cannot be misread as a signal A component which originates a command Light emitting diode a type of diode that emits light when current passes through it Visible LEDs are used as indicator lights on all sorts of electronic devices Low voltage differential SCSI signalling method that combines the benefits of HVD and single ended technologies allowing longer cabling configurations while consuming less power than HVD technology An initiating device a component which originates a command Creates information units IUs from commands data status information etc which are passed as synchronous transfers Maximizes bus use minimizes command overhead and allows multiple commands to be transferred in a single connection Although SCSI transfer speeds have changed dramatically over the past several generations cable specifications have remained constant Higher speed and frequency signals have a greater potential for reflection and distortion over distance Pre compensation techniques slightly modify the SCSI signal to reduce the chance of these types of problems Term Quick Arbitration Select QAS Arbitration read and write data streaming receiver SCSI single ended training pattern Definition
16. o the ExpressPCl host adapter Please follow standard methods to avoid ESD Installation Remember to back up your system data before changing or installing hardware 1 Plan your SCSI device connections If connecting both internal and external devices to the ATTO ExpressPCI SCSI adapter be sure to have the appropriate cables to connect devices 2 Set SCSI device termination Devices at both ends of the SCSI bus must be terminated Devices in the middle of the bus including the ATTO ExpressPCl adapter must have termination removed or disabled ATTO ExpressPCI SCSI adapters select the proper termination if left in auto termination mode 3 Set SCSI IDs Each device on the SCSI bus requires a unique SCSI ID one different from the host adapter ID The default setting for the ATTO ExpressPCl adapter is 7 If you need to change this setting refer to the ATTO Utilities Installation and Operation manual Also refer to your SCSI device documentation to determine the current SCSI ID and how to change it Wide 16 bit SCSI devices can be assigned IDs 0 to 7 and 8 to 15 while Narrow 8 bit devices can only be assigned IDs ranging from 0 to 7 4 Review system documentation to select an appropriate slot to install your adapter The combined power consumption of the expansion slots must not exceed the limits for your system If you have more than one expansion card installed ensure power consumption is within the limits outlined fo
17. r your system 5 Power down the computer and unplug the computer from all power sources 6 Open the case 7 Install the adapter in any open PCI expansion slot Consult your computer s documentation if you have questions about how to install an expansion card in your system 8 Connect SCSI devices by inserting a SCSI cable to the connector on the ATTO ExpressPClI host adapter until you hear a click Refer to Appendix B when selecting cables 9 Close the computer case and power it up ATTO ExpressPCl host adapters come preconfigured to operate properly in a variety of common system setups However some systems may benefit by tuning the adapter for optimal performance Refer to the ATTO Utilities Installation and Operation manual for Exhibit 2 3 ExpressPCI ULSD LP more information on changing host adapter settings Exhibit 2 1 Express PCI UL4D f i i 4 Exhibit 2 2 ExpressPCI ULSD 4 ATTO Technology Inc ExpressPCI Host Adapter Installation and Operation Manual 3 Installing and Updating Drivers Flash After installing the ATTO ExpressPClI Host Adapter you must configure your system to recognize and use it by installing drivers for your operating system Use the ATTO Configuration Tool found in the ATTO Utilities application from the ATTO website or on the Installation CD which comes with your adapter Note If you already have one or more ExpressPCl adapters installed and you are installing additional adapt
18. responsibility to repair or replace a defective product is the sole and exclusive remedy provided to the customer for breech of this warranty ATTO Technology Inc is not liable for any indirect special incidental or consequential damages irrespective of whether ATTO Technology Inc has advance notice of the possibility of such damages No ATTO Technology Inc dealer agent or employee is authorized to make any modification extension or addition to this warranty viii ATTO Technology Inc ExpressPCI Host Adapter Installation and Operation Manual
19. rnal and external cable connectors External connectors 68 pin VHDCI 68 pin P 50 pin 50 pin Centronics high density 68 pin male standard 50 pin female opacpooooocnooooccaoooo0a0 popooocopoopooopoopooonnoaoogp Exhibit A 2 The following table lists the maximum number of devices you may connect at specific cable distances using differential and single ended SCSI in various SCSI environments Bus speed Bus width Max bus lengths meters Max device MB sec max bits Single ended LVD HVD support SCSI 1 5 8 6 25 8 Fast SCSI 10 8 3 25 8 Fast Wide SCSI 20 16 3 25 16 Wide Ultra WIDE SCSI 40 16 25 16 Wide Ultra WIDE SCSI 40 16 1 5 8 Wide Ultra WIDE SCSI 40 16 3 5 4 Ultra2 SCSI 80 16 12 16 Ultra160 SCSI 160 16 12 16 Ultra320 SCSI 320 16 12 16 iv ATTO Technology Inc ExpressPCI Host Adapter Installation and Operation Manual Appendix C ATTO Product Guide Contact an ATTO Technology authorized sales representative to order Celerity selection guide Celerity Celerity Lege es Celerity Celerity Product Features FC 44ES FC 42ES FC 41EL FC 42XS FC 41XS Fibre Channel Ports 4 2 1 2 1 FC protocol 4 Gb 4 Gb 4 Gb 4 Gb 4 Gb Maximum Transfer Rate half duplex 1 6 GB sec 800 MB
20. specifications e Operating temperature 0 45C e Humidity 10 90 non condensing e Airflow 100 LFM min e Reliability e MTBF 150 000 hours e MTTR lt 15 minutes ExpressPCI UL4D Host Adapter e Accelerated PCI bus management UL4D Host Adapter e PCI Bus Master rate of 1 GB sec e Two external VHDCI and two internal high PCI X 1 0a compliant density 68 pin connectors PCI 2 2 compliant Supports up to 30 SCSI bus IDs 15 per channel e 64 bit 133 Mhz PCI X backward compatible Dimensions with standard PCl e Length 6 521 e Power e Height 4 450 e 0 75 typical 2 0 max Amps 5 0 VDC 0 05 Amps 12 0 VDC ExpressPCI UL5D UL5D LP Host Adapter Supports up to 30 SCSI bus IDs 15 per channel Power e PCI Express PCle bus management e 1 61 typical 2 03 max Amps 3 3 VDC e PCI Bus master rate 2 GB sec e 0 65 typical 1 46 Amps 12 0 VDC e PCI Express 1 0b compliant UL5D LP Host Adapter UL5D Host Adapter e Dual stacked external VHDCI connectors e Two external VHDCI and two internal high e Dimensions density connectors Length 6 6 Dimensions e Height 2 713 e Length 7 5 e Power Height 4 376 0 55 typical 0 9 max Amps 3 3 VDC e 0 56 typical 0 59 max Amps 12 0 VDC e Low profile bracket available ExpressPCI Ultra 320 Host Adapter selection guide Dual Channel 2 independent channels ExpressPCI Ultra 320 ExpressPCI Ultra
21. st Java updates have been applied 2 Open the installation CD volume 3 Select the Configuration Tool folder 4 Launch the Configuration Tool 5 Follow the on screen instructions until the installation completes 6 Linux 1 Verify in the terminal window that the installed Java Virtual Machine Java is from Sun by typing java version The GNU version JVM which may be installed by default does not work with the installer 2 Inthe File Browser window browse to mnt cdrom Linux Configuration Tool 3 Double click Inx_app_configtool_XXX bin 4 Follow the on screen instructions until the installation completes ATTO Technology Inc ExpressPC Host Adapter Installation and Operation Manual Appendix A Glossary Some terms used in the storage industry are defined below More information is available through the ATTO Technology website www attotech com and the SCSI Trade Association www scsita org Term ANSI Asynchronous Information Protection bit byte CRC destination address domain validation double transition clocking flow control host HVD initiator device LED LVD originator packetization pre compensation Definition American National Standards Institute AIP although most Ultra32Otraffic is sent synchronously and protected by CRC some information is still sent asynchronously AIP implements CRC level error checking on asynchronous traffic ensuring end to end data integrity Smalle
22. st unit of data a computer can process a single binary digit with a value of either 0 or 1 An ordered set of 8 bits Cyclic Redundancy Checking an error correcting code which calculates a numeric value for received and transmitted data If no error has occurred during transmission the CRC for both received and transmitted data should be the same A value in the frame header of each frame which identifies the port in the node where the frame is being sent Before sending data domain validation verifies that the physical connection is capable of handling the negotiated transfer speed If the system determines that Ultra320speeds are not feasible a slower speed is enforced Increases the data line frequency to equal that of the request signal allowing sampling on both the leading and trailing edges of the request signal Clocking can be set to ensure compatibility with legacy devices The target indicates to the initiator when the last packet of a data stream will be transferred so that the initiator can flush FIFOs and terminate pre fetch sooner than previously possible Basically the target warns the initiator that the transfer is almost complete so that it can prepare for the next transfer while the target completes the current transfer A processor usually a CPU and memory which communicates with devices over an interface High voltage differential uses two wires transmitting a signal on one and its inverse on the other At the rece
23. tact your computer system manufacturer To facilitate proper air circulation ATTO host adapters should never be operated in a computer system without the cover installed or with an inoperable fan as this may cause safety or thermal problems which could damage the ATTO host adapter and void the warranty ATTO Technology Inc limited warranty ATTO Technology Inc warrants to the original purchaser of this product that it is free from defects in material and workmanship as described in the ATTO Technology website www attotech com ATTO Technology Inc liability shall be limited to replacing or repairing at its option any defective product There is no charge for parts or labor should ATTO Technology Inc determine that this product is defective Products which have been subject to abuse misuse alteration neglected or have been serviced repaired or installed by unauthorized personnel shall not be covered under this warranty provision Damage resulting from incorrect connection or an inappropriate application of this product shall not be the responsibility of ATTO Technology Inc Liability is limited to ATTO Technology Inc product s damage to other equipment connected to ATTO Technology Inc product s is the customer s responsibility This warranty is made in lieu of any other warranty express or implied ATTO Technology Inc disclaims any implied warranties of merchantability or fitness for a particular purpose ATTO Technology Inc
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