Dell PowerVault MD3260i CLI Guide - Page 46
Using Host Servers To Create An Initial Snapshot Virtual Disk, Creating A Snapshot Virtual Disk - powervault md3200i
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Table 10. Snapshot Virtual Disk Commands Command create snapshotVirtualDisk re-create snapshot set (snapshotVirtualDisk) stop snapshot Description Creates a snapshot virtual disk. Starts a fresh copy-on-write operation by using an existing snapshot virtual disk. Defines the properties for a snapshot virtual disk and enables you to rename a snapshot virtual disk. 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. For details on mapping the snapshot virtual disk to the secondary node, see the Dell PowerVault MD3200 and MD3220 Storage Arrays With Microsoft Windows Server Failover Clusters or Dell PowerVault MD3200i and MD3220i Storage Arrays With Microsoft Windows Server Failover Clusters at support.dell.com/manuals. 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. • You must satisfy the requirements of your host operating system for creating snapshot virtual disks. Failure to meet the requirements of your host operating system results in an inaccurate point-in-time image of the source virtual disk or the target virtual disk in a virtual disk copy. Creating A Snapshot Virtual Disk The create snapshotVirtualDisk command provides three methods for defining the physical disks for your snapshot repository virtual disk: • Define each physical disk for the snapshot repository virtual disk by enclosure ID and slot ID. • Define a disk group in which the snapshot repository virtual disk resides. Optionally define the capacity of the repository virtual disk. • Define the number of physical disks, but not specific physical disks, for the repository virtual disk. When using the create snapshotVirtualDisk command to create a snapshot virtual disk, the standard virtual disk name for the source virtual disk is the minimum information required. When you provide only the standard virtual disk name, the storage management software provides default values for the other required property parameters for a snapshot virtual disk. 46