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HP StorageWorks 2300 Modular Smart Array reference guide (500911-001, January 2009)

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62 Provisioning the system
Copy a volume
With the appropriate license, you can copy a volume or a snapshot to a new standard volume. The
destination volume must be in a vdisk owned by the same controller as the source volume. If the source
volume is a snapshot, you can choose whether to include its modified data (data written to the snapshot
since it was created). The resulting volume is completely independent of the source volume.
Figure 4 Copying a master volume and a snapshot
CAUTION: To avoid data corruption in the destination volume, before copying a snapshot's modified
data either unmount the volume or otherwise ensure that there is no host I/O to the volume.
You can copy a volume now or schedule the copy task.
NOTE: The first time a standard volume is copied, the volume is converted to a master volume and a snap
pool is created. The snap pool's size is 20% of the volume size or 10 GB, whichever is larger. Before
creating or scheduling copies, verify that the vdisk has enough free space.
Master Volume Transient Snapshot Data Transfer New Volume
1. Volume copy request is made with a master volume as the source.
2. A new volume is created for the volume copy, and a hidden, transient snapshot is created.
3. Data is transferred from the transient snapshot to the new volume.
4. On completion, the transient volume is deleted and the new volume is a completely
independent copy of the master volume, representing the data that was present when the
volume copy was started.
Volume Copy from a Master Volume
Master Volume Snapshot(s) Data Transfer New Volume
1. A master volume exists with one or more snapshots associated with it. Snapshots can be in
Volume Copy from a Snapshot
their original state or they can be modified.
2. You can select any snapshot to copy, and you can specify that the modified or unmodified data be
copied.
3. On completion, the new volume is a completely independent copy of the snapshot. The snapshot
still remains, though you can choose to delete it.