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Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Recopying the virtual disk

You can use the Copy Manager to create a new virtual disk copy for a selected source virtual disk and a target virtual disk. Use this option when you have stopped a virtual disk copy and want to start it again or when a virtual disk copy has failed or completed. The virtual disk copy starts over from the beginning.

Keep these guidelines in mind when re-copying a virtual disk:
  • If hosts are mapped to the source virtual disk, the data that is copied to the target virtual disk when you perform the re-copy operation might have changed since the previous virtual disk copy was created.
  • Select only one virtual disk copy in the Copy Manager dialog.
CAUTION: Possible loss of data—The re-copying operation overwrites existing data on the target virtual disk.
CAUTION: Possible loss of data access—While a virtual disk copy has a status of In Progress or Pending, source virtual disks are available for read I/O activity only. Write requests are allowed after the virtual disk copy has completed.
To recopy the virtual disk:
  1. Stop all I/O to the source virtual disk and the target virtual disk.
  2. Unmount any file systems on the source virtual disk and the target virtual disk.
  3. In the AMW, select Copy Services > Virtual Disk Copy > Manage Copies.
    The Copy Manager window is displayed.
  4. Select the copy pair in the table.
  5. Select Copy > Re-Copy.
    The Re-Copy window is displayed.
  6. Set the copy priority.
    There are five copy priority rates available: lowest, low, medium, high, and highest. If the copy priority is set at the lowest rate, I/O activity is prioritized, and the virtual disk copy takes longer. If the copy priority is set to the highest priority rate, the virtual disk copy is prioritized, but I/O activity for the storage array might be affected.
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