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150 Configuration: Premium Feature—Snapshot Virtual Disks
Remember the following guidelines before creating a Snapshot Virtual Disk:
• 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 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 <filename-identifier>
and
press <Enter>. For more information, see "SMrepassist Utility" on
page 281.
book.book Page 150 Wednesday, June 8, 2011 5:01 PM