Installation and User's Guide - Services and Support

IBM Confidentialor specify /instantrestore=no on the command line interface. If VSS InstantRestore capability is needed for single databases, make sure to place thesedatabases in their own storage group.How can I use VSS and Legacy backups together in a common backup strategy?See “Using VSS and Legacy Backups together” on page 15 and “Back up toTivoli Storage Manager storage versus back up to local shadow volumes”on page 32 for detailed information.Can I restore Legacy backups and VSS Backups together?No, Legacy backups and VSS Backups cannot be mixed due to a Microsoftlimitation. See “Using VSS and Legacy Backups together” on page 15 formore information.Are VSS Restores restored into the Recovery Storage Group?No, VSS Restores ignore the Recovery Storage Group and are placeddirectly into the production database. This is a Microsoft limitation. See“VSS restore considerations” on page 59 for more information.Why are all my databases dismounted when I perform a VSS Restore?All databases are dismounted during VSS Restore processing due to aMicrosoft requirement.How does VSS Instant Restore work?VSS Instant Restore is a volume-level hardware-assisted copy where targetvolumes (that contain the snapshot) are copied back to the original sourcevolumes. A SAN Volume Controller, DS6000, or DS8000 storage subsystemis required to perform VSS Instant Restores. See “VSS Instant Restore” onpage 12 for more information.Now that I am performing VSS operations, why are there so many activebackups?Tivoli Storage Manager policy manages VSS Backups residing on localshadow volumes and on Tivoli Storage Manager server storage. Thisallows for different policies which can lead to an increase in the number ofactive backups. See “How Tivoli Storage Manager server policy affectsData Protection for Exchange” on page 18 and “Back up to Tivoli StorageManager storage versus back up to local shadow volumes” on page 32 formore information.Can I use dynamic disks with VSS operations?No, dynamic disks are not allowed with VSS operations. Disks that containExchange data must be configured as basic if a hardware provider is used.Can I use UNC drive letters with VSS off-loaded backups?No, Data Protection for Exchange VSS off-loaded backups will not processcorrectly if the Exchange storage group, database, or log location arespecified with UNC-based drive letters. For example, the following pathuses UNC drive letters and is not supported in a VSS off-loaded backup:\\host_srv1\c$\Program Files\Exchsrvr\First Storage GroupThe following path is specified correctly:C:\Program Files\Exchsrvr\First Storage GroupDrive-based names are supported when using a volume mount point,cluster drive, or both. For example:X:\Exch_Mount_Point\Program Files\Exchsrvr\First Storage Group126 Storage Manager for Mail 5.5: Data Protection for Microsoft Exchange Server Installation and User’s Guide