Dell POWERVAULT MD3600I - Manual (Page 172)

• To use this option, select only one copy pair in the Copy Manager.
• When the virtual disk copy is stopped, all of the mapped hosts have write access to the source virtual disk. If
data is written to the source virtual disk, the data on the target virtual disk no longer matches the data on the
source virtual disk.
To stop a virtual disk copy, complete the following steps:
1. In the AMW, select the Storage & Copy Services tab and select Copy Services → Virtual Disks → Manage Copies.
The Copy Manager window is displayed.
2. Select the copy pair in the table.
3. Select Copy → Stop.
4. Click Yes.
Recopying A Virtual Disk
You can recopy a virtual disk when you have stopped a virtual disk copy and you want to start it again or when a virtual
disk copy has failed. The Recopy option overwrites existing data on the target virtual disk and makes the target virtual
disk read-only to hosts. This option fails all snapshot virtual disks associated with the target virtual disk, if any exist.
Preparing Host Servers To Recopy A Virtual Disk
NOTE: Before you create a new copy of a source virtual disk, stop any data access (I/O) activity or suspend data
transfer to the source virtual disk (and, if applicable, the target 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(s) in Windows or unmounting the virtual drive in
Linux helps to guarantee a stable copy of the drive for the virtual disk copy.
Before creating a new virtual disk copy for an existing copy pair, both the host server and the associated virtual disk you
are recopying have to be in the proper state. Perform the following steps to prepare your host server and virtual disk:
1. Stop all I/O activity to the source and target virtual disk.
2. Using your Windows system, flush the cache to both the source and the target virtual disk (if mounted). At the host
prompt, type: SMrepassist -f and press .
For more information, see
SMrepassist Utility .
3. Click the Summary tab, then click Storage & Copy Services to ensure that the virtual disk is in Optimal or Disabled
status.
4. Remove the drive letter(s) of the source and (if mounted) virtual disk in Windows or unmount the virtual drive(s) in
Linux to help guarantee a stable copy of the drive for the virtual disk. If this is not done, the copy operation reports
that it has completed successfully, but the copied data is not updated properly.
5. Follow any additional instructions for your operating system. Failure to follow these additional instructions can
create unusable virtual disk copies.
NOTE: If your operating system requires additional instructions, you can find those instructions in your
operating system documentation.
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