Using Serviceguard Extension for RAC, 5th Edition, June 2007

Maintenance and Troubleshooting
Replacing Disks
Chapter 4 229
2. Replace new disk.
The new disk size needs to be of equal or greater size. This is
required whether or not the disk replacement is online or offline.
3. Restore the LVM header to the new disk using the following
command:
# vgcfgrestore -n [vg name] [pv raw path]
It is only necessary to perform the vgcfgrestore operation once
from any node on the cluster.
4. Attach PV or Activate the VG from each node of the cluster using the
following commands:
# pvchange -a y [pv path]
OR
# vgchange -a [y|e|s] [vg name]
The PV must be detached from all nodes and much be attached from
each of the nodes to make it usable. Alternatively, you can re-activate
the VG from each of the nodes. (This command cannot attach all the
paths to the PV, therefore each PV link has to be attached as well.)
NOTE After executing one of the commands above, any I/O queued for the
device will restart. If the device replaced in step #2 was a mirror
copy, then it will begin the resynchronization process, which may
take a significant amount of time to complete. The progress of the
resynchronization process can be observed using the vgdisplay(1M),
lvdisplay(1M) or pvdisplay(1M) commands.
Offline Replacement of a Mechanism in an HA
Enclosure Configured with Shared LVM (SLVM)
Hot plugging of disks is not supported for Oracle RAC data, which is
configured in volume groups with Shared LVM (SLVM). If you need this
capability, you should use disk arrays for your Oracle RAC data.