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Installation and User's Guide

Installation and User's Guide

Installation and User's Guide

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“Configuring Open File Support” on page 63“Image backup” on page 130 to install <strong>and</strong> configure the LVSA“Snapshotcachesize” on page 469“Mode” on page 414“Comparing methods 1 <strong>and</strong> 2” on page 134 to decide which method is appropriatefor your environment.Offline <strong>and</strong> online image backupThe traditional offline image backup prevents write access to the volume by othersystem applications during the operation.If open file support has been configured, Tivoli Storage Manager performs asnapshot backup or archive of files that are locked (or "in use") by otherapplications. To control an open file support operation with LVSA, you can specifythese additional options in your dsm.opt file or as values of the include.fs option:snapshotcachelocation, snapshotcachesize, snapshotfsidleretries, snapshotfsidlewait,snapshotproviderfs, presnapshotcmd, postsnapshotcmd.You can also use VSS for open file support. If you use VSS, you do not need toinstall LVSA.The following considerations apply to offline <strong>and</strong> online image backups:v If you create an image of the system drive, you cannot restore it to the originallocation. Restore of any image requires that the client have an exclusive lock ofthe volume you are restoring to, so the system drive cannot be restored sinceTivoli Storage Manager is unable to lock the system drive. You can restore animage backup of the system drive to an alternate location.v Because of different system component configurations, the system image not beconsistent across components (such as Active Directory). Some of thesecomponents can be configured to use different volumes where parts are installedon the system drive <strong>and</strong> others to non-system volumes.v Install the Tivoli Storage Manager client program on the system drive. The clientcannot restore an image to the same volume where the client program isinstalled.v Image backup is only supported on volumes that have a mount point or a driveletter assigned. Tivoli Storage Manager will not back up a volume without amount point or drive letter.v If bad disk sectors are detected on the source drive during a LAN-free orLAN-based image backup, data corruption occur. In this case, bad sectors areskipped when sending image data to the Tivoli Storage Manager server. If baddisk sectors are detected during the image backup, a warning message is issuedafter the image backup completes.Utilizing image backup to perform file system incrementalbackupThere are two methods of utilizing image backups to perform efficient incrementalbackups of your file system. These backup methods allow you to performpoint-in-time restore of your file systems <strong>and</strong> improve backup <strong>and</strong> restoreperformance.544 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: <strong>Installation</strong> <strong>and</strong> <strong>User's</strong> <strong>Guide</strong>

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