Dell POWERVAULT MD3600F User Manual

Page 155

Configuration: Premium Feature—Snapshot Virtual Disks

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• You must satisfy the requirements of your host operating system for

creating snapshot virtual disks. Failure to meet the requirements of your

host operating system results in an inaccurate snapshot of the source

virtual disk or the target virtual disk in a virtual disk copy.

NOTE:

Before you create a new snapshot of a source virtual disk, stop any data

access (I/O) activity or suspend data transfer to the source virtual disk to ensure that

you capture an accurate snapshot of the source virtual disk. Close all applications,

including Windows Internet Explorer, to ensure 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 Snapshot.

Before creating a snapshot virtual disk, the host server must be in the proper

state. To prepare your host server:

1 Stop all I/O activity to the source.
2 Using your Windows system, flush the cache to the source. At the host

prompt, type SMrepassist -f and

press . For more information, see "SMrepassist Utility" on

3 Remove 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.

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.

advanced path.

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