Replacing an Internal Disk Drive CRU

Replacing an Internal Mirrored Disk Drive CRU
This procedure describes how to replace an internal mirrored disk drive CRU online.
You might need to replace a CRU if it has failed, partially failed, or if you are upgrading
the disk drives. You do not need to shut down the system before replacing a disk drive
CRU.
Caution: On pre-G06.24 RVUs that are not running SPR T9753AFN or later,
disable DBIO before stopping or disconnecting a mirrored drive. Although a failure is
rare, resuming operations on a mirrored drive could corrupt the volume label on both
the primary and mirror drives. All paths to the disk volume might enter a hard down
state and cause a system or application outage if:
The primary and mirror drive are in the same enclosure.●
Both active paths are from the same ServerNet fabric (if the PRIMARY and
MIRRORBACKUP or the BACKUP and MIRROR paths are active).
●
If a ServerNet chip fails while the volume label is being updated.●
Instructions for disabling and re-enabling DBIO are included in Steps 4 and 10. This
precaution is unnecessary if G06.24 or SPR T9753AFN and later are configured and
running.
Note: To avoid rare outages caused by volume label corruption on pre-G06.24
RVUs, install SPR T9753AFR or its superseding SPR. This SPR supersedes
T9753AFN.
The following is a high-level summary of the tasks required to complete the
replacement procedure. Each task in this summary is linked to step-by-step
instructions about how to perform that task.
Whenever you handle an internal disk drive CRU, follow standard operating practices
to avoid damage to the equipment.
Caution:
1 Read the important Notes for Replacing an Internal Mirrored Disk Drive CRU.