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146 Configuration: Premium Feature—Snapshot Virtual Disks
NOTE: For details on mapping the snapshot virtual disk to the secondary node, see
the
Dell PowerVault MD3200 and MD3220 Storage Arrays With Microsoft Windows
Server Failover Clusters
on support.dell.com/manuals.
NOTE: You can create concurrent snapshots of a source virtual disk on both the
source disk group and on another disk group.
Before creating a Snapshot Virtual Disk, note that:
• The following types of virtual disks are not valid source virtual disks:
– Snapshot repository virtual disks
– Snapshot virtual disks
– Replication repository virtual disks
– Target virtual disks that are participating in a virtual disk copy
NOTE: Virtual Disk Copy is an Advanced (Premium) feature.
• 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 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 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.
book.book Page 146 Wednesday, June 8, 2011 5:01 PM