Dell PowerVault MD3000 Information Update page 10

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. Perform the following steps to prepare your server and
virtual disk:
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 User's Guide for more information.
3 Click the Summary tab, then click the Disk Groups & Virtual Disks link to ensure that the snapshot
virtual disk is in Optimal or Disabled status.
4 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 will report that it has completed successfully, but the
snapshot data will not be updated properly.
5 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.
Re-creating a Snapshot Virtual Disk
After first preparing the host server(s) as specified in the preceding procedure, re-create a snapshot
virtual disk using the following steps.
NOTICE:
This action invalidates the current snapshot.
1 Click the Modify tab, then click the Modify snapshot virtual disks link.
2 Click the Re-create Snapshot Virtual Disks link.
3 Highlight the snapshot virtual disk to re-create and click the Re-Create button beneath the list.
4 In the Confirm Snapshot Virtual Disk Re-Creation dialog box, type yes and then click the OK button.
Re-creating a snapshot repository virtual disk uses the previously configured snapshot name and parameters.
Preparations for Creating a Virtual Disk Copy
Use the Create Virtual Disk Copies feature on the Configure tab to create a full copy of a source virtual
disk. This operation overwrites any existing data on the target virtual disk. Once the virtual disk copy has
started, all I/O activity to the source virtual disk is read-only. Any attempts to write to the source virtual
disk fail until the operation is complete.
NOTE:
It is recommended that you create a virtual disk copy from a snapshot virtual disk rather than from the
original virtual disk. This allows the original virtual disk to remain in full use while the snapshot of this virtual disk
is used as the source for the virtual disk copy operation.
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Information Update