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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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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 SMrepassist ‑f <filename-identifier> and press <Enter>. See "SMrepassist Utility" in the Owner’s Manual for more information.
  3. Remove 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.
  4. Follow 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 server has been prepared, see Re-creating The Snapshot Virtual Disk to re-create the snapshot virtual disk.

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