Xsan 1.4 Migration Guide (Manual)
Contents
1. 1 1 2 or 1 3 on Mac OS X version 10 3 or Mac OS X version 10 4 Note If you are still running Xsan 1 0 or 1 0 1 you can follow the instructions in the appendix to move to Xsan 1 1 on Mac OS X v10 4 and then follow the steps in this chapter to complete the upgrade The following steps summarize how to upgrade your SAN to Xsan 14 if your controllers are running Xsan 1 1 or later If needed upgrade your controllers to Mac OS X v10 4 7 If needed migrate Xsan on your controllers to the equivalent Tiger version If needed upgrade controllers and clients one version at a time to Xsan 1 3 Upgrade your controllers to Xsan 1 4 Upgrade the Xsan Admin application on administrator computers Optionally return control of volumes to specific controllers Optionally upgrade client computers to Mac OS X v10 4 7 and Xsan 1 4 Instructions for each of these steps appear on the following pages Warning Do not make any changes to Xsan settings using either Xsan Admin or the command line tools while you are upgrading your SAN controllers If you need to make configuration changes wait until you finish upgrading all of your controllers Step 1 If needed upgrade SAN controllers to Mac OS X v10 4 7 Xsan 1 4 requires Mac OS X or Mac OS X Server v10 4 7 If your SAN controllers are running an earlier version of Mac OS X you must upgrade the controllers to v10 4 7 or later before you upgrade Xsan Important If you want your SAN v2. a Client to Standby Controller on page 9 If Volume Availability During the Upgrade Is Not Important If your SAN volumes don t need to be available during the upgrade you can stop the volumes and then perform the upgrade as you would any software upgrade without relying on controller failover Stopping volumes lets you skip intermediate versions so you can upgrade directly for example from Xsan 1 1 to Xsan 1 4 without installing Xsan 1 2 or 1 3 which you would otherwise have to install to maintain volume availability during the upgrade However if you are upgrading to Mac OS X or Mac OS X Server v10 4 be sure that you choose to perform an upgrade installation not a clean installation Otherwise you ll lose your volume and SAN configuration files About Primary and Standby Controllers Each Xsan volume is hosted by a metadata controller called the volume s primary controller To ensure availability of the volume and to protect against data loss you usually set up at least one other computer called a standby controller to act as a backup If a volume s primary controller or the file system processes running on it become unresponsive the standby controller takes control of the volume during controller failover On a controller that is hosting more than one volume it s possible for a single volume to fail over to a standby controller while other volumes hosted by the controller continue unaffected The volume that
3. computers to version 1 4 Note You can run version 1 4 of the Xsan Admin application on any computer with Mac OS X or Mac OS X Server v10 4 7 or later installed To upgrade the Xsan Admin application If you have an Xsan 14 installation disc insert it in the administrator computer open the Admin Tools folder and double click XsanAdmin pkg If you don t have the disc but the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan Admin version 1 4 update and click Install If the computer is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the administrator computer and run it Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Step 6 Optionally return control of volumes to a specific controller When you restart a controller during the upgrade process control of the volumes the controller is hosting switches to a standby controller After you finish upgrading you can use the cvadmin command line tool to return control of a volume to a specific controller To switch control of a volume to the other controller Go to a controller open Terminal and type sudo cvadmin e fail volume where volume is the name of the Xsan volume To see which controller is hosting a volume Open Xsan Admin select the volume in the SAN
4. perform the steps in Chapter 2 Why You Must First Upgrade to Xsan 1 1 on Mac OS X v10 3 9 Your Xsan volumes remain available to clients during the upgrade if you have at least one standby controller During the upgrade Xsan switches control of volumes from the controller you re upgrading to a standby controller This change of control called failover takes place automatically when the controller that is hosting a volume is not responding as is the case when you restart it during software installation However a controller running Xsan 1 0 on Mac OS X v10 3 can t fail over directly to a controller running Xsan 1 1 on Mac OS X v10 4 Therefore to make sure your Xsan volumes are available to users throughout the upgrade process you start by upgrading your controllers to Xsan 1 1 on Mac OS X v10 3 9 Then when you upgrade these controllers to Mac OS X v10 4 1 or later failover can take place as needed Important If you upgrade the standby controllers directly to Mac O X v104 failover can t take place until the primary controller is also upgraded and your volumes will be unavailable until you finish upgrading the primary controller to Xsan 1 1 on Mac OS X v10 4 1 or later 20 wu BB WwW N Why You Must Upgrade to Xsan 1 1 Twice Xsan 1 1 on Mac OS X v10 3 is not the same software as Xsan 1 1 on Mac OS X v104 So you need to upgrade once when your controllers are running Mac OS X v10 3 9 and a second time after upgrading to
5. 10 4 you must first upgrade your controllers to Xsan 1 1 on Mac OS X v10 3 9 so that failover can take place and your volumes will be available during the upgrade If your volumes don t need to be available during the upgrade you don t have to ensure failover compatibility and can skip to Upgrade standby controllers to Xsan 1 1 on Mac OS X v10 4 7 or later on page 23 Important If you want your SAN volumes to be available to clients during the upgrade upgrade your controllers one at a time so there is always a standby controller ready to take control of any volume currently hosted by the controller you are upgrading To upgrade your controllers to Mac OS X v10 3 9 1 Run the update installer on a controller computer If the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Mac OS X Combined version 10 3 9 update and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it 2 Restart the controller computer when prompted 3 Repeat steps 1 and 2 above for each controller on your SAN Appendix Upgrading to Xsan 1 1 on Mac OS X version 10 4 21 22 Step 3 Upgrade all controllers to Xsan 1 1 on Mac OS X v10 3 9 Now that the controllers are running Mac OS X v10 3 9 you can u
6. Components list and click Overview The name of the volume s controller is to the right of Hosted by You can also find out which controller is hosting a volume using the cvadmin tool in Terminal Open Terminal ona controller and type sudo cvadmin e select If you have more than two controllers You can t directly specify the controller that a volume switches to during failover Xsan chooses a standby controller based on its failover priority and other factors If you have only two controllers you know the volume will switch from one to the other but if you have three or more controllers it can be more difficult to know which standby controller will assume control To be sure that a volume switches to a specific controller you can temporarily change the role of the third or any additional controllers to Client during the failover Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Step 7 Optionally upgrade client computers Clients running Xsan 1 3 on Mac OS X v10 3 9 or on any version of Mac OS X v10 4 can use volumes hosted by controllers running Xsan 1 4 so you don t have to upgrade your clients to Xsan 1 4 However upgrading the client computers on your SAN is highly recommended Note You won t be able to change the role of a client computer to controller unless you upgrade the client to Xsan 1 4 To upgrade client computers to Xsan 1 4 Run the Mac OS X v10 4 7 update installer on the client computer If t
7. Mac OS X v10 4 7 or later to get all the capabilities of Xsan on Mac OS X Tiger The following steps summarize how to move from Xsan 1 0 on Mac OS X v10 3 to Xsan 1 1 on Mac OS X v10 4 Unmount volumes from all controllers Upgrade all controllers to Mac OS X v10 3 9 Upgrade all controllers to Xsan 1 1 on Mac OS X v10 3 9 Upgrade standby controllers to Xsan 1 1 on Mac OS X v10 4 7 or later Upgrade the primary controller to Xsan 1 1 on Mac OS X v10 4 7 or later Warning Do not make any changes to Xsan settings using either Xsan Admin or the command line tools while you are upgrading your SAN controllers If you need to make configuration changes wait until you finish upgrading all of your controllers After you complete these steps return to Chapter 2 to finish the upgrade to Xsan 1 4 Appendix Upgrading to Xsan 1 1 on Mac OS X version 10 4 Step 1 Unmount volumes from all controllers To avoid difficulties mounting volumes on controllers after upgrading unmount Xsan volumes from the controllers before you upgrade Unmounting volumes from the controllers does not affect availability for clients To unmount a volume In Xsan Admin select the volume in the SAN Components list and click Clients Then select a controller and click Unmount Step 2 Upgrade all controllers to Mac OS X v10 3 9 Because Xsan 1 0 controllers can t switch control of volumes directly to Xsan 1 1 controllers that are running Mac OS X v
8. Xsan Migration Guide Instructions for upgrading to Xsan 1 4 Apple Computer Inc 2006 Apple Computer Inc All rights reserved Under the copyright laws this manual may not be copied in whole or in part without the written consent of Apple The Apple logo is a trademark of Apple Computer Inc registered in the U S and other countries Use of the keyboard Apple logo Option Shift K for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws Every effort has been made to ensure that the information in this manual is accurate Apple is not responsible for printing or clerical errors Apple 1 Infinite Loop Cupertino CA 95014 2084 408 996 1010 www apple com Apple the Apple logo Final Cut Pro Mac Macintosh the Mac logo Mac OS Panther and Xsan are trademarks of Apple Computer Inc registered in the U S and other countries Finder and Tiger are trademarks of Apple Computer Inc StorNext and ADIC are registered trademarks of Advanced Digital Information Corporation Other company and product names mentioned herein are trademarks of their respective companies Mention of third party products is for informational purposes only and constitutes neither an endorsement nor a recommendation Apple assumes no responsibility with regard to the performance or use of these products The product des
9. ading read Chapter 1 For instructions that show how to upgrade from Xsan 1 1 1 2 or 1 3 to Xsan 1 4 on Mac OS X or Mac OS X Server version 10 4 read Chapter 2 For instructions that show how to first upgrade from Xsan 1 0 to the prerequisite Xsan 1 1 on Mac OS X or Mac OS X Server version 10 4 read the appendix Notation Conventions The following conventions are used in this book wherever shell commands or other command line items are described Notation Indicates fixed width font A command or other terminal text A shell prompt text_in_brackets An optional parameter one other Alternative parameters type one or the other underlined A parameter you must replace with a value A parameter that may be repeated lt angle_brackets gt A displayed value that depends on your SAN configuration Preface About This Guide General Information About Upgrading Xsan Review the information in this chapter before you upgrade your Xsan storage area network About Macintosh Computers with Intel Processors Macintosh computers with Intel processors run only Xsan 1 4 or later so they don t need to be upgraded However if you add a Macintosh computer with an Intel processor to your SAN as a metadata controller you must upgrade all other controllers on the SAN to Xsan 1 4 and make sure that all SAN clients are running at least Xsan 1 3 If you add a Macintosh client with an Intel processor which can onl
10. click Check Now select the Xsan update with the same version as was installed on Panther and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller when prompted by the installer Any volume currently hosted by the controller fails over to a standby controller 3 Repeat steps 1 and 2 above for each controller on your SAN Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Step 3 If needed upgrade Xsan on controllers and clients to Xsan 1 3 If you are already running Xsan 1 3 on your controllers and clients you can go on to Step 4 on the next page If your controllers and clients are not running Xsan 1 3 and you want to upgrade without interrupting volume availability you must migrate your controllers and clients one version of Xsan at a time to permit failover until they are all running Xsan 1 3 Also your clients need to be no more than one version behind your controllers If you don t need to keep your volumes available during the upgrade you can stop the volumes and skip to Step 4 on the next page to install Xsan 1 4 without installing intermediate versions To upgrade your SAN one version of Xsan at a time Run the update installer for the next version of Xsan on the controller computer For example if you are c
11. cribed in this manual incorporates copyright protection technology that is protected by method claims of certain U S patents and other intellectual property rights owned by Macrovision Corporation and other rights owners Use of this copyright protection technology must be authorized by Macrovision Corporation and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision Corporation Reverse engineering or disassembly is prohibited Apparatus Claims of U S Patent Nos 4 631 603 4 577 216 4 819 098 and 4 907 093 licensed for limited viewing uses only Simultaneously published in the United States and Canada 019 0739 07 21 06 Contents Preface 5 About This Guide 5 Notation Conventions Chapter 1 7 General Information About Upgrading Xsan 7 About Macintosh Computers with Intel Processors 7 Migrating Without Interruption 8 About Primary and Standby Controllers 8 If You Don t Have a Standby Controller 9 Where to Get the Updates 9 MacOS X or Mac OS X Server 10 Version Compatibility Chapter 2 11 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Appendix 19 Upgrading to Xsan 1 1 on Mac OS X version 10 4 Contents About This Guide Preface This guide shows how to upgrade to Xsan 1 4 without interrupting volume availability Follow the instructions in this guide to upgrade your Xsan SAN to Xsan 14 on Mac OS X or Mac OS X Server version 10 4 For general information about upgr
12. d to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Mac OS X or Mac OS X Server The Xsan file system the Xsan Admin application and the Xsan User Quotas application run identically on Mac OS X and Mac OS X Server Any statement in this guide about Mac OS X also applies to Mac OS X Server Chapter 1 General Information About Upgrading Xsan Version Compatibility The following table shows which versions of Xsan and StorNext controllers and clients can be used on the same SAN Controller Client Compatible Xsan 1 4 Xsan 1 4 Yes Xsan 1 3 Mac OS X v10 4 Yes Xsan 1 3 Mac OS X v10 3 Yes for LUNs lt 2 TB Xsan 1 2 or earlier No StorNext 2 8 No StorNext FX 1 3 or 1 4 Yes StorNext 2 6 or 2 7 Yes StorNext 2 5 or earlier No Xsan 1 3 Mac OS X v10 4 Xsan 1 4 No Xsan 1 3 Mac OS X v10 4 Yes Xsan 1 3 Mac OS X v10 3 Yes Xsan 1 2 Mac OS X v10 4 Yes Xsan 1 2 Mac OS X v10 3 Yes StorNext FX 1 3 or 1 4 Yes StorNext 2 6 or 2 7 Yes StorNext 2 5 or earlier No StorNext 2 8 Xsan 1 4 or 1 3 Yes Xsan 1 2 No StorNext 2 7 Xsan 1 4 No Xsan 1 2 or 1 3 Yes StorNext 2 6 or earlier Any version of Xsan No Chapter 1 General Information About Upgrading Xsan N DO Ww A UN Upgrading to Xsan 1 4 on Mac OS X version 10 4 Follow the instructions in this chapter if you are currently using Xsan 1
13. de This allows uninterrupted access to your SAN volumes during the upgrade To promote a client to controller In Xsan Admin select the SAN in the SAN Components list and click Setup Click Computers select the client in the computer list and click Edit Choose Controller from the Role pop up menu If necessary change the network interface in the Access the SAN via pop up menu to the SAN s Ethernet network Click OK and then click Save Where to Get the Updates There are several ways you can install the software updates mentioned in this guide Xsan Updates If you have an Xsan installation disc insert it in the computer and double click the installation package Install Xsan mpkg If you don t have the disc but the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the appropriate Xsan update and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Mac OS X v10 4 7 Update If the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Mac OS X Update Combined version 10 4 7 or later update and click Install If the computer is on a private network you can use a computer that is connecte
14. failed over now has a different primary controller than the other volumes So on a SAN with more than one volume each volume can through the process of failover end up on a different primary controller The instructions in this guide take advantage of failover to maintain volume availability without you having to know which controller is hosting a volume All you need to be sure of is that there is another controller ready to host volumes that are currently hosted on the controller you are upgrading If You Don t Have a Standby Controller If you have set up your SAN with a single metadata controller you can do one of the following during the upgrade e Unmount and stop all of your SAN volumes for the duration of the upgrade The volumes will be unavailable during the upgrade Temporarily promote a client computer to the role of controller during the upgrade Clients will be able to use the volumes during the upgrade Note You should consider permanently adding a second controller to your SAN Losing a metadata controller without a standby can result in the loss of all data on a volume and means that your volumes are not available during controller upgrades Adding a second controller to your SAN is highly recommended Chapter 1 General Information About Upgrading Xsan A U N Promoting a Client to Standby Controller You can temporarily change the role of a client computer so that it acts as a standby controller during the upgra
15. he computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Mac OS X Combined version 10 4 7 update or later and click Install If the client is on a private network you can use a computer that is connected to the Internet to download the update installer from www apple com support downloads transfer the installer to the client computer and run it Restart the client computer when prompted Upgrade the client to Xsan 1 4 If you have an Xsan 14 installation disc insert it in the computer and double click the installation package Install Xsan mpkg If you don t have the disc but the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan 1 4 update and click Install If the computer is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the client computer and run it Restart the client when prompted by the installer Repeat steps 1 through 4 above for each client on your SAN Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Upgrading to Xsan 1 1 on Mac OS X version 10 4 Appendix If you re still running Xsan 1 0 on Mac OS X v10 3 Panther you need to follow the instructions in this chapter to migrate to Xsan 1 1 on Mac OS X v10 4 Tiger before you can
16. ler is connected to the Internet you can open the Software Update pane of System Preferences click Check Now and install the Mac OS X or Mac OS X Server v10 4 7 or later update If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Upgrade the primary controller to Xsan 1 1 If you have an Xsan 1 1 installation disc insert it in the computer and double click the installation package Install Xsan mpkg If you don t have the disc but the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan version 1 1 update and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller when prompted by the installer You can now return to Chapter 2 to finish upgrading to Xsan 1 4 Appendix Upgrading to Xsan 1 1 on Mac OS X version 10 4
17. n 1 4 When all controllers are running Xsan 1 3 on Mac OS X v10 4 7 you can upgrade the Xsan software to Xsan 1 4 Important If you want your SAN volumes to be available to clients during the upgrade upgrade the controllers one at a time so that there is always a standby controller to assume control of any volume currently hosted by the controller you are upgrading To upgrade Xsan on the controllers Upgrade one controller to Xsan 1 4 If you have an Xsan 14 installation disc insert it in the computer and double click the installation package Install Xsan mpkg If you don t have the disc but the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan version 1 4 update and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller when prompted by the installer Any volume currently hosted by the controller fails over to a standby controller 3 Repeat steps 1 and 2 above for each additional controller on your SAN Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 16 Step 5 Upgrade the Xsan Admin application on administrator computers If you run Xsan Admin on other computers to make it easier to manage the SAN upgrade the application on those
18. nnected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan version 1 1 update and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller when prompted by the installer Repeat steps 1 through 6 above for each additional standby controller on your SAN Appendix Upgrading to Xsan 1 1 on Mac OS X version 10 4 23 Step 5 Upgrade the primary controller to Xsan 1 1 on Mac OS X v10 4 7 or later Now that the standby controllers are running Xsan 1 1 on Mac OS X or Mac OS X Server v10 4 7 or later you can upgrade the primary controller To upgrade your primary controller to Xsan 1 1 on Mac OS X v10 4 7 Insert the Mac OS X version 10 4 software installation disc in the primary controller computer and double click the Install Mac OS X icon When you reach the Select Destination pane of the installer click Options and select Upgrade Mac OS X Important Be sure to select the upgrade installation not the clean installation If you perform a clean installation of the operating system the controller will lose its copy of the Xsan configuration files Restart the controller computer when prompted by the installer Upgrade the controller to Mac OS X v10 4 7 or later If the control
19. olumes to remain available to clients during the upgrade upgrade your SAN controllers one at a time so there is always a standby controller ready to take control of any volume currently hosted by the controller you are upgrading Note If you want you can use the cvadmin fail command to force failover and then verify that it was successful before you upgrade a controller instead of relying on failover to take place behind the scenes when you restart the computer For more information see the cvadmin man page To upgrade your controllers to Mac OS X v10 4 7 If the controller is currently running any version of Mac OS X v10 4 Tiger skip to step 3 below If the controller is running any version of Mac OS X v10 3 Panther insert the Mac OS X v10 4 software installation disc in a controller computer and double click the Install Mac OS X icon When you reach the Select Destination pane of the installer click Options and select Upgrade Mac OS X Important Be sure to select the upgrade installation not the clean installation If you perform a clean installation of the operating system the controller will lose its copy of the Xsan configuration files Restart the controller computer when prompted by the installer Run the Mac OS X v10 4 7 update installer on the controller If the controller is connected to the Internet you can open the Software Update pane of System Preferences click Check Now and install the Mac OS X or Mac OS X Ser
20. pgrade the Xsan software to Xsan 1 1 Important If you want your SAN volumes to be available to clients during the upgrade upgrade the controllers one at a time so that there is always a standby controller to take control of any volume currently hosted by the controller you are upgrading To upgrade Xsan on the controllers Upgrade one controller to Xsan 1 1 If you have an Xsan 1 1 installation disc insert it in the computer and double click the installation package Install Xsan mpkg If you don t have the disc but the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan version 1 1 update and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller when prompted by the installer Any volume currently hosted by the controller fails over to a standby controller 3 Repeat steps 1 and 2 above on each controller on your SAN Appendix Upgrading to Xsan 1 1 on Mac OS X version 10 4 Step 4 Upgrade standby controllers to Xsan 1 1 on Mac OS X v10 4 7 or later Now you can upgrade your controllers to Xsan 1 1 on Mac OS X or Mac OS X Server v10 4 7 or later Important If you want your SAN volumes to be available to clients during the upgrade upgrade you
21. r standby controllers one at a time so there is always a standby controller ready to take control of any volume currently hosted by the controller you are upgrading To upgrade your standby controllers to Xsan 1 1 on Mac OS X v10 4 7 or later Insert the Mac OS X version 10 4 software installation disc in a standby controller computer and double click the Install Mac OS X icon When you reach the Select Destination pane of the installer click Options and select Upgrade Mac OS X Important Be sure to select the upgrade installation not the clean installation If you perform a clean installation of the operating system the controller will lose its copy of the Xsan configuration files Restart the controller computer when prompted by the installer Upgrade the controller to Mac OS X v10 4 7 or later If the controller is connected to the Internet you can open the Software Update pane of System Preferences click Check Now and install the Mac OS X or Mac OS X Server v10 4 7 or later update If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Upgrade the standby controller to Xsan 1 1 If you have an Xsan 1 1 installation disc insert it in the computer and double click the installation package Install Xsan mpkg If you don t have the disc but the computer is co
22. urrently running Xsan 1 2 run the installer for Xsan 1 3 If the controller is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan update with the appropriate version number and click Install If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller computer when prompted Repeat steps 1 and 2 above for each controller on your SAN Upgrade a client to the next version of Xsan If the computer is connected to the Internet you can open the Software Update pane of System Preferences click Check Now select the Xsan update with the appropriate version number and click Install If the computer is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the client computer and run it Restart the client when prompted by the installer Repeat steps 4 and 5 above for each client on your SAN If all your controllers and clients are now running Xsan 1 3 go on to Step 4 on the next page Otherwise repeat steps 1 through 6 above to upgrade your SAN computers to the next version of Xsan Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Step 4 Upgrade controllers to Xsa
23. ver v10 4 7 or later update If the controller is on a private network you can use a computer that is connected to the Internet to download the update from www apple com support downloads transfer the installer to the controller computer and run it Restart the controller when prompted Repeat steps 1 through 4 above for each controller on your SAN Chapter 2 Upgrading to Xsan 1 4 on Mac OS X version 10 4 Step 2 If needed migrate controllers to the equivalent Tiger version of Xsan If your controllers were already running Xsan on Mac OS X v10 4 before you started this upgrade go on to Step 3 on the next page If you upgraded your controllers from Mac OS X v10 3 Panther to v10 4 Tiger in Step 1 on the previous page you need to migrate the old Panther version of Xsan to the same version for Tiger So for example if you were running Xsan 1 1 for Panther on Mac OS X v10 3 and have upgraded the operating system to Mac OS X v10 4 7 you need to upgrade to Xsan 1 1 for Tiger Important If you want your SAN volumes to be available to clients during the upgrade upgrade the controllers one at a time so that there is always a standby controller to take control of any volume currently hosted by the controller you are upgrading To upgrade Xsan on the controllers Upgrade the controller to its equivalent Tiger version of Xsan If the controller is connected to the Internet you can open the Software Update pane of System Preferences
24. y run Xsan 1 4 your controllers must also be running Xsan 1 4 and all SAN clients must be running Xsan 1 3 or later For more compatibility information see the table on page 10 Migrating Without Interruption The instructions in this guide show you how to upgrade without interfering with the availability of your Xsan volumes If you follow the instructions clients and applications can access the SAN volumes during the upgrade This availability is based on Xsan s ability to switch control of a volume from one metadata controller to another if the first becomes unresponsive This process called failover requires you to have at least two metadata controllers on your SAN The failover method of avoiding SAN interruption works only when you upgrade from the most recent previous version of Xsan for example from Xsan 1 3 to Xsan 1 4 If you skip a version by upgrading directly from Xsan 1 1 or 1 2 to Xsan 1 4 failover won t work and you ll need to unmount and stop Xsan volumes before upgrading Note Even if you have two controllers on your SAN there will be a brief period when the controller you are upgrading is restarting during which your SAN has only one functioning controller If you can t afford to risk this single point of failure even for a short time you should temporarily add a third controller to your SAN You can do this by temporarily promoting a suitable client computer to the role of controller See Promoting
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