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Configuration: Premium Feature— Remote Replication 181
Snapshot Virtual Disk With Remote Replication
A snapshot virtual disk is a point-in-time image of a virtual disk. In a remote
replication, do not mount a snapshot virtual disk on the same server as the
primary virtual disk.
Virtual Disk Copy With Remote Replication
The virtual disk copy premium feature copies data from a source virtual disk
to a target virtual disk within the same storage array.
A primary virtual disk in a remote replication can be either a source virtual
disk or a target virtual disk in a virtual disk copy.
You can create a virtual disk copy on the primary virtual disk in a replicated pair,
but you cannot create a virtual disk copy of a secondary virtual disk in a replicated
pair. Instead, you can copy a secondary virtual disk in one of two ways:
• Promote the secondary virtual disk to the primary role.
CAUTION: If a primary/secondary role reversal is begun while a virtual disk copy
is in progress, the virtual disk copy fails and be unable to restart.
• Create a snapshot virtual disk of the secondary virtual disk, then perform a
virtual disk copy of the snapshot virtual disk.
Virtual Disk Expansion With Remote Replication
Virtual Disk Expansion (VDE) increases the capacity of an existing virtual
disk. This increased capacity is achieved by using the free capacity available
on either:
• The disk group of the standard virtual disk, or
• The snapshot repository virtual disk.
Performing a VDE operation does not interrupt access to data on disk groups,
virtual disks or physical disks.
A VDE operation can be performed on a primary virtual disk or a secondary
virtual disk of a replicated pair. It cannot be performed on a replication
repository virtual disk. No other action can be performed on a virtual disk
while it is undergoing expansion (except normal disk I/O).
NOTE: To perform a VDE operation, the remote replication must be in Optimal
status. The properties pane in the logical view displays the status of a virtual disk.
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