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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Creating A Snapshot Group

A snapshot group is a sequence of point-in-time images of a single associated base virtual disk. A snapshot group uses a repository to save data for all snapshot images contained in the group. The repository is created at the same time the snapshot group is created.
Guidelines when creating a snapshot group:
  • When a base virtual disk that contains a snapshot group is added to an asynchronous remote replication group, the system automatically changes the repository full policy to automatically purge the oldest snapshot image and sets the auto-delete limit to the maximum allowable snapshot limit for a snapshot group.
  • If the base virtual disk resides on a standard disk group, the repository members for any associated snapshot group can reside on either a standard disk group or a disk pool. If a base virtual disk resides on a disk pool, all repository members for any associated snapshot group must reside on the same disk pool as the base virtual disk.
  • You cannot create a snapshot group on a failed virtual disk.
  • If you attempt to create a snapshot image, that snapshot image creation operation might remain in a Pending state because of the following conditions:
    • The base virtual disk that contains this snapshot image is a member of an asynchronous remote replication group.
    • The base virtual disk is currently in a synchronizing operation. The snapshot image creation completes as soon as the synchronization operation is complete.
To create a snapshot group:
create snapGroup userLabel="
                                    snapGroupName" sourceVirtualDisk="
                                    virtualDiskName" (repositoryVirtualDisk="repos_xxxx" | repositoryVirtualDisk=(
                                    diskGroupName [capacity=
                                    capacityValue]) repositoryVirtualDisk=(
                                    diskPoolName [capacity=
                                    capacityValue])) [repositoryFullPolicy=(failBaseWrites | purgeSnapImages) | rollbackPriority=(highest | high | medium | low | lowest) |
                                    repositoryFullLimit=percentValue | autoDeleteLimit=numberOfSnapImages | enableSchedule=(TRUE | FALSE) schedule=(immediate
                                    | snapshotSchedule)]
                                 

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