HP P6000 Replication Solutions Manager User Guide (T3680-96089, October 2012)

• Resizing is not supported when the destination is unavailable.
• You can expand the size of a DR group member (virtual disk) whether the DR group is in
synchronous or asynchronous mode. However, there are certain considerations for expansion
in enhanced asynchronous mode (between arrays running controller software 6.0x or later).
If you expand a virtual disk while in enhanced asynchronous mode, the DR group log is not
resized to reflect the expanded virtual disk. If the expansion is small, the log may be able to
accommodate it. If the expansion is substantial, the log may not be large enough to handle
it.
Expand a DR group member only when the DR group is in synchronous mode as follows:
1. Change the write mode from asynchronous to synchronous.
2. Complete the expansion of the DR group member.
3. If you previously set the maximum size of the DR group log, change the size of the log
to accommodate the expanded DR group member. If the log size was previously
determined by the controller software, no user action is necessary.
4. Change the write mode to asynchronous.
The DR group log size is adjusted to accommodate the expanded DR group member.
DC-Management FAQ
• Can I extend or shrink any host volume?
No. DC-Management is not supported on all host agents. See DC-Management support.
• Will extending or shrinking a host volume impact host I/O to the array?
Using DC-Management automatic policies, you can extend or shrink a host volume at any
time without disrupting host I/O.
• Can I use DC-Management with HP P6000 Continuous Access?
Yes. See Using DC-Management with replication for more information.
• Can I use DC-Management with HP P6000 Business Copy?
You cannot use DC-Management with snapshots or mirrorclones created using HP P6000
Business Copy. See Using DC-Management with replication for more information.
• Can I create a snapshot or mirrorclone on a virtual disk that has a DC-Management policy set
on it?
No. If you set a dynamic policy on a host volume and then create a snapshot or mirrorclone
on the underlying virtual disk, the policy will not execute properly. See Using DC-Management
with replication for more information.
• Can I manually resize a host volume that has a DC-Management policy set on it?
Yes, but you should be aware of the interaction. See Using DC-Management with replication
for more information.
• How much can I expand a host volume?
You can extend a host volume until its size reaches that of the underlying virtual disk. At that
point, it is necessary to extend the size of the virtual disk to provide additional capacity to
extend the file system.
• How much can I shrink a host volume?
The minimum size to which you can shrink a host volume is determined by the amount of data
on the host volume. You cannot make a host volume too small to accommodate the data on
it.
Host volume concepts 143