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.