Dell MD3220, MD3200 owner manual Preparing Host Servers to Re-create a Snapshot Virtual Disk, 151

Preparing Host Servers to Re-create a Snapshot Virtual Disk

NOTE: Before you create a new snapshot 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 snapshot 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 host server and the associated virtual disk you are re-creating have to be in the proper state.

To prepare your host server and virtual disk:

1Stop all I/O activity to the source and snapshot virtual disk (if mounted).

2Using your Windows system, flush the cache to both the source and the snapshot virtual disk (if mounted). At the host prompt, type

SMrepassist -f <filename-identifier>

and press <Enter>. For more information, see "SMrepassist Utility" on page 235.

3Click the Summary tab, then click Disk Groups & Virtual Disks to ensure that the snapshot virtual disk is in Optimal or Disabled status.

4Remove the drive letter(s) of the source and (if mounted) snapshot virtual disk in Windows or unmount the virtual drive(s) in Linux to help guarantee a stable copy of the drive for the Snapshot. If this is not done, the snapshot operation reports that it has completed successfully, but the snapshot data is not updated properly.

5Follow any additional instructions for your operating system. Failure to follow these additional instructions can create unusable snapshot virtual disks.

NOTE: If your operating system requires additional instructions, you can find those instructions in your operating system documentation.

Configuration: Premium Feature—Snapshot Virtual Disks

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