Using Repair Storage System; Replacing Disks In Hot-Swap Storage Systems; Disk Replacement Requirements - HP StorageWorks P4000 User Manual

• Planning for rebuilding data on either the disk or the entire storage system (all storage systems)
• Powering the disk off in the CMC (non-hot-swap storage systems)
• Physically replacing the disk in the storage system (all storage systems)
• Powering the disk on in the CMC (non-hot-swap storage systems)
• Rebuilding RAID on the disk or on the storage system (all storage systems)
Table 15 lists disk replacement requirements for specific configurations and storage systems.
Table 15 Disk replacement requirements
Storage system or configuration
Hot-swap storage systems configured for
RAID 1, 10, 5, 50, or 6
VSA
Non-hot-swap storage systems [IBM
x3650]
RAID 0 configuration
Additional information about preparing for disk replacement is included in the following sections
below:
• Preparing for a disk replacement
• Best practice checklist for single disk replacement in RAID 0
• Best practice checklist for single disk replacement in RAID 1, RAID 10, RAID 5, RAID 50, and
RAID 6

Using Repair Storage System

Repair Storage System is a procedure that allows you to replace a disk and trigger only one resync
of data, rather than a complete restripe. Repair Storage System creates a place-holder system in the
cluster, while allowing the storage system needing repair to be removed for the disk replacement.
See "Repairing a storage
In the following circumstances, you may have to use the Repair Storage System feature when replacing
disks.
• When RAID is OFF on a storage system with RAID 0
• When replacing multiple disks on a storage system with RAID 5, RAID 50 or RAID 6
• When multiple disks on the same mirror set need to be replaced on a storage system with RAID
10.

Replacing disks in hot-swap storage systems

In hot-swap storage systems configured with RAID 1, RAID 10, RAID 5, RAID 50, or RAID 6, a faulty
or failed disk can be removed and replaced with a new one. RAID will rebuild and the drive will
return to Normal status.
Requirements
RAID is normal and Safe to Remove status is yes. See
disks in hot-swap storage
Replace disk on host server according to manufacturer's instructions.
Power off disk in CMC before physically replacing disk. See
cing a disk in a non-hot-swap storage system (IBM
Plan for data conservation before replacing disk. Power off disk in
CMC before physically replacing disk. See
RAID 0.
system" on page 184 for more information.
systems.
Replacing a disk in
P4000 SAN Solution user guide
Replacing
Repla-
x3650).
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