Dell POWERVAULT MD3620I Owner's Manual page 161

• You cannot create a snapshot of a virtual disk that contains unreadable
sectors.
• 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 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 Snapshot.
Before creating a snapshot virtual disk, the host server has to be in the proper
state. To ensure that the host server is properly prepared to 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.
2 In the AMW, select the Logical tab and select a valid source virtual disk.
3 Select Virtual Disk Snapshot Create. Alternatively, you can right-
click the source virtual disk and select Create Snapshot Virtual Disk from
the pop-up menu.
The Create Snapshot Virtual Disk Wizard - Introduction dialog is
displayed.
4 Select Simple (Recommended) and click Next.
The Specify Snapshot Schedule window is displayed.
5 Select Yes to set up a schedule for the new snapshot virtual disk creation.
To skip this option and create the snapshot immediately, select No.
6 If you specified a snapshot schedule, define the schedule details in the
Create Snapshot Schedule window and click Next.
7 Enter the Snapshot virtual disk name and the Snapshot repository virtual
disk name and click Next.
The Specify Snapshot Repository Capacity window is displayed.
Configuration: Premium Feature—Snapshot Virtual Disks
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