Dell 34XX Create snapshotVirtualDisk, Re-create snapshot, Set snapshotVirtualDisk, Stop snapshot

The following table lists the components that comprise a snapshot virtual disk and briefly describes what they do.

Table 9. Snapshot Virtual Disk Components

Component	Description
Source virtual disk	Standard virtual disk from which the snapshot is
	created
Snapshot virtual disk	Point-in-time image of a standard virtual disk
Snapshot repository virtual disk	Virtual disk that contains snapshot metadata and
	copy-on-write data for a particular snapshot virtual
	disk

The following table lists the snapshot virtual disk commands and brief descriptions of what the commands do.

Table 10. Snapshot Virtual Disk Commands

Command	Description
create snapshotVirtualDisk	Creates a snapshot virtual disk.
re-create snapshot	Starts a fresh copy-on-write operation by using an
	existing snapshot virtual disk.
set (snapshotVirtualDisk)	Defines the properties for a snapshot virtual disk
	and enables you to rename a snapshot virtual disk.
stop snapshot	Stops a copy-on-write operation.

Using Host Servers To Create An Initial Snapshot Virtual Disk

CAUTION: Before using the Snapshot Virtual Disks Premium Feature in a Microsoft Windows clustered configuration, you must first map the snapshot virtual disk to the cluster node that owns the source virtual disk. This ensures that the cluster nodes correctly recognize the snapshot virtual disk.

If you map the snapshot virtual disk to the node that does not own the source virtual disk before the snapshot enabling process is completed, the operating system may fail to correctly identify the snapshot virtual disk. This can result in data loss on the source virtual disk or an inaccessible snapshot.

NOTE: You can create concurrent snapshots of a source virtual disk on both the source disk group and on another disk group.

Before creating a Snapshot Virtual Disk, note the following:

•The following types of virtual disks are not valid source virtual disks: snapshot repository virtual disks, snapshot virtual disks, target virtual disks that are participating in a virtual disk copy.

•You cannot create a snapshot of a virtual disk that contains unreadable sectors.

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