HP P4000 9.0 HP StorageWorks P4000 SAN Solution User Guide - Page 71
Using Repair Storage System, Replacing disks in hot-swap storage systems
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• 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 Requirements Hot-swap storage systems configured for RAID is normal and Safe to Remove status is yes. See Replacing RAID 1, 10, 5, 50, or 6 disks in hot-swap storage systems. VSA Replace disk on host server according to manufacturer's instructions. Non-hot-swap storage systems [IBM x3650] Power off disk in CMC before physically replacing disk. See Replacing a disk in a non-hot-swap storage system (IBM x3650). RAID 0 configuration Plan for data conservation before replacing disk. Power off disk in CMC before physically replacing disk. See Replacing a disk in RAID 0. 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 system" on page 184 for more information. 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. P4000 SAN Solution user guide 71