Dell PowerVault MD3200 CLI Guide - Page 75
Re-creating the Snapshot Virtual Disk, Preparing Host Servers to Re-create a Snapshot Virtual Disk
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When you stop the copy-on-write operations for a specific snapshot virtual disk, only that snapshot virtual disk is disabled. All other snapshot virtual disks remain in operation. Re-creating the Snapshot Virtual Disk To restart a copy-on-write operation, use the recreate snapshot virtualDisk command. This command starts a fresh copy-on-write operation using an existing snapshot virtual disk. When you restart a snapshot virtual disk, the snapshot virtual disk must have either an Optimal or a Disabled state. The following conditions then occur: • All copy-on-write data previously on the snapshot repository virtual disk is deleted. • Snapshot virtual disk and snapshot repository virtual disk parameters remain the same as the previously disabled snapshot virtual disk and snapshot repository virtual disk. You can also change the userLabel, warningThresholdPercent, and repositoryFullPolicy parameters when you restart the snapshot virtual disk. • The original names for the snapshot repository virtual disk are retained. Preparing Host Servers to Re-create a Snapshot Virtual Disk CAUTION: Before you create a new point-in-time image of a source virtual disk, stop any data access (I/O) activity or suspend data transfer to the source virtual disk and snapshot virtual disk to ensure that you capture an accurate point-in-time image of the source virtual disk. Close all applications, including Windows Internet Explorer, to make sure all I/O activity has stopped. NOTE: Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot. Before re-creating a snapshot virtual disk, both the server and the associated virtual disk you are re-creating have to be in the proper state. To ensure that the host server is properly prepared to re-create a snapshot virtual disk, you can either use an application to carry out this task, or you can perform the following steps: 1 Stop all I/O activity to the source and snapshot virtual disk (if mounted). 2 Using your Windows system, flush the cache to both the source and the snapshot virtual disk (if mounted). At the host prompt, type Using the Snapshot Feature 75