Using Serviceguard Extension for RAC, 3rd Edition, May 2006

Maintenance and Troubleshooting
Replacing Disks
Chapter 4 197
2. Halt all the applications using the SLVM VG on all the nodes but
one.
3. Re-activate the volume group in exclusive mode on all nodes of the
cluster:
# vgchange -a e -x <slvm vg>
4. Reconfigure the volume:
vgextend, lvextend, disk addition, etc
5. Activate the volume group to shared mode:
# vgchange -a s -x <slvm vg>
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.
If you are using software mirroring for shared concurrent activation of
Oracle RAC data with MirrorDisk/UX and the mirrored disks are
mounted in a high availability disk enclosure, use the following steps to
carry out offline replacement:
1. Make a note of the physical volume name of the failed mechanism
(for example, /dev/dsk/c2t3d0).
2. Deactivate the volume group on all nodes of the cluster:
# vgchange -a n vg_ops
3. Replace the bad disk mechanism with a good one.
4. From one node, initialize the volume group information on the good
mechanism using vgcfgrestore(1M), specifying the name of the
volume group and the name of the physical volume that is being
replaced:
# vgcfgrestore /dev/vg_ops /dev/dsk/c2t3d0
5. Activate the volume group on one node in exclusive mode then
deactivate the volume group:
# vgchange -a e vg_ops