Chapter 7: Protecting Your Data ● 78Creating a SnapshotNote: Snapshot is an upgrade feature; if the snapshot feature is locked, see Adding EnhancedFeatures on page 19 for information on purchasing a feature key.A snapshot is a frozen image of a logical drive at a particular point in time. You can copy thedata on one logical device to another logical device by creating a snapshot. You may want to dothis if you want to back up your data to tape, clone a drive, or copy the data to multiple servers.There are two snapshot options:● Snapshot Backup—Copies all data on a logical drive so that it can be moved from oneserver to another. See the following sections.● Snapshot Nobackup—Creates a temporary copy of a logical drive for tape backup andreference (uses less system resources than Snapshot Backup).Snapshot Limitations● You can create a snapshot of only one controller at a time; you can’t create a snapshot thatincludes multiple controllers.● The source logical drive (the logical drive that you’re copying) and the target logical drive(the logical drive that you’re copying to) must be on the same controller.● The source and target logical drives may have the same or different RAID levels.● You can create up to four snapshots on each controller.● The size of the target logical drive must be greater than or equal to the size of the sourcelogical drive.● You can’t modify any information on a snapshot.Creating a Snapshot with BackupTo create a snapshot with backup:1 In the Logical Devices View, right-click the logical drive you want to copy.2 Select Create snapshot, click with backup to, then click the name of the target logical drive.The snapshot is created on the target logical drive. The snapshot appears in AdaptecStorage Manager with a camera icon beside it, as shown at right.Creating a Snapshot Without BackupTo create a snapshot without backup:1 In the Logical Devices View, right-click the logical drive you want to copy.2 Select Create snapshot, click without backup to, then click the name of the target logicaldrive.The snapshot is created on the target logical drive. The snapshot appears in AdaptecStorage Manager with a camera icon beside it, as shown at right.3 Use an operating system-level or third-party data backup tool to move the snapshot onto atape drive or other server.
