Dell MD3220, MD3200 owner manual Creating the Snapshot Using the Advanced Path, 149

2Using your Windows system, flush the cache to the source. At the host prompt, type SMrepassist -f<filename-identifier>and press <Enter>. For more information, see "SMrepassist Utility" on page 247.

3Remove the drive letter(s) of the source 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.

NOTE: Verify that the virtual disk has a status of Optimal or Disabled by clicking the Summary tab and then clicking Disk Groups & Virtual Disks.

4Follow 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.

After your host server is prepared, see "Creating a Snapshot Virtual Disk Using the Advanced Path" on page 146 to create the snapshot using the advanced path.

If you want to use a snapshot regularly, such as for backups, use the Disable Snapshot and Re-create Snapshot options to reuse the snapshot. Disabling and re-creating snapshots preserves the existing virtual disk-to-host mappings to the snapshot virtual disk.

Creating the Snapshot Using the Advanced Path

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.

After first preparing the host server(s) as specified in the preceding procedure, complete the following steps to create a virtual disk snapshot using the advanced path:

1Stop the host application accessing the source virtual disk, and unmount the source virtual disk.

2In the AMW, select the Logical tab, select a valid source virtual disk.

Configuration: Premium Feature—Snapshot Virtual Disks

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