13.4 Administering Sun StorEdge A3x00 or Sun StorEdge A1000 Disks

The procedures for administering Sun StorEdge A3x00 or Sun StorEdge A1000 disks in a Sun Cluster configuration are identical to those used with nodes that are not clustered. Refer to your expansion unit documentation for procedures to add, replace, or repair disks or disk components in your disk expansion unit.

13.4.1 Adding a Sun StorEdge A3x00 or Sun StorEdge A1000 Disk

When adding drives to a Sun StorEdge A3x00 or a Sun StorEdge A1000, add the drives while the system is up and running. Do not reboot the system. Doing so may cause a loss of configuration information on the new drives, and a loss of data and logical unit (LUN) configuration on the existing drives.

If you do see a problem, such as not seeing pre-existing LUNs after adding drives and rebooting the system, then remove the newly-added drives, restart the system, then add them one at a time.

This problem does not occur when the drives are added to an "unused" disk group on a running system, after which it is safe to reboot the system. Because hot-plugging is fully supported on the Sun StorEdge A3x00 and the Sun StorEdge A1000, this is the accepted procedure.

13.4.2 Replacing a Sun StorEdge A3x00 or Sun StorEdge A1000 Disk

The Sun Cluster sees Sun StorEdge A3x00 or Sun StorEdge A1000 disks as logical units (LUNs) and not as physical disks. Because of this:

• As long as the LUN is available, no action is necessary when replacing a failed physical disk.

• If the LUN is not available (or not in an optimal state) and was used as a quorum device, you need to use the scconf -q command to change the quorum device to a different LUN (disk) before proceeding with the disk replacement procedure.

For additional information regarding logical units and physical disks, refer to your expansion unit documentation.