7-12 Upgrading Your System
When the hard disks are in the disk array configuration, you can restore the state before an error
using the auto-rebuild feature that stores the data in the old hard disk into a new one.
The auto-rebuild feature is available for the RAID1, RAID5, or RAID0+1 disk array
configuration.
Auto-rebuild is carried out when you hot-swap a failed hard disk with a new one (replace the disk
while the server is powered). While auto-rebuild is in progress, the DISK lamp flashes green and
amber alternatively to indicate it.
IMPORTANT:
! When auto-rebuild fails, the DISK lamp lights in amber. Remove and
install the hard disk again to restart auto-rebuild.
! If the disk array monitoring utility is installed, it may display or act as
follows. If the DISK lamp does not light in amber after auto-rebuild,
however, auto-rebuild has completed successfully.
– Displays "Rebuild was cancelled" on the screen while auto-rebuild
is in progress.
– Appears to stop and restart auto-rebuild.
Observe the following notes for auto-rebuild.
! Do not power off the server in the period between a hard disk error and completion of
auto-rebuild.
! When you removed a hard disk, wait at least 90 seconds before installing the hard disk
back again.
! Do not replace another hard disk while rebuilding is in progress. (The DISK lamp flashes
in green and amber alternatively while rebuilding the hard disk.)