Dell 38XX, 34XX, 32XX, 36XX manual Creating a Consistency Group Snapshot Image

Create a consistency group snapshot virtual disk that has a repository full limit set to 60 percent on a snapshot consistency group named snapCG1 with these three members cgm1, cgm2, and cgm3, with the following command:

create cgSnapVirtualDisk userLabel="cgSnapVirtualDisk3" cgSnapImageID="snapCG1:oldest" repositoryFullLimit=60;

Create a read/write consistency group snapshot virtual disk with automatic repository selection on a snapshot consistency group named snapCG1 with members cgm1, cgm2, and cgm3, with the following command:

create cgSnapVirtualDisk userLabel="cgSnapVirtualDisk4" cgSnapImageID="snapCG1:oldest";

Creating A Consistency Group Snapshot Image

To create a new snapshot image for each base virtual disk in snapshot consistency group, use the create cgSnapImage command. The command will suspend all pending I/O operations to each base virtual disk that is a member of the consistency group before creating the snapshot images. If the snapshot image cannot be completed successfully for all of the consistency group members, this command fails and new snapshot images are not created.

Since all members of a snapshot consistency group normally contain the same number of snapshot images, adding a new member to a snapshot consistency group with this command create a new member lacking previously created snapshot images. This is not an indication of an error condition.

To create a consistency group snapshot image:

create cgSnapImage consistencyGroup="consistencyGroupName"

where, consistencyGroup is the name of the consistency group for which you are creating snapshot images.

Deleting A Snapshot Virtual Disk Or A Consistency Group Snapshot Virtual Disk

You can use the following command to delete a snapshot virtual disk or a consistency group snapshot virtual disk. Optionally, you can also delete the repository members.

delete cgSnapVirtualDisk ["snapVirtualDiskName"] [deleteRepositoryMembers=(TRUE FALSE)];

where, snapVirtualDiskName is the snapshot you want to delete. The deleteRepositoryMembers=TRUE parameter will preserve the member virtual disks (default). Setting the parameter to FALSE will delete the member virtual disks.

Deleting A Consistency Group Snapshot Image

You can delete the snapshot images in a consistency group. However, when you delete a consistency group snapshot image that is associated with a consistency group snapshot virtual disk, the corresponding snapshot virtual disk member in the consistency group snapshot virtual disk is transitioned to a Stopped state. Being in this state means that the snapshot virtual disk member no longer has a relationship to the snapshot group of the deleted snapshot image. A snapshot virtual disk member in a Stopped state maintains its relationship to its consistency group snapshot virtual disk.

When a snapshot image(s) is deleted from a consistency group:

•The snapshot is deleted from the storage array.

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