Adaptec 5325302053 User Guide - Page 157
Failed Disk Drive Protected by a Hot Spare, Failure in Multiple Pools Simultaneously
UPC - 753253020539
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This section explains how to recover when a disk drive fails: • If the pool was protected by a hot spare (see the next section). • If the pool was not protected by a hot spare (see page 151). • If there is a disk drive failure in more than one pool simultaneously (see page 151). • If it is a RAID 0 pool (see page 152). • If multiple disk drives fail within the same pool (see page 152). Failed Disk Drive Protected by a Hot Spare When a pool is protected by a hot spare, if a disk drive in that pool fails the hot spare is automatically incorporated into the pool and takes over for the failed drive. For instance, when a disk drive fails in a RAID 5 pool, the pool is automatically rebuilt (its data is reconstructed) using the hot spare in place of the failed drive. You can't access the pool until the rebuilding is complete. Note In Adaptec Storage Manager, the color of the hot spare changes from lightblue to dark-blue, showing that it is now part of a pool. To recover from the failure: 1 Remove and replace the failed disk drive (following the instructions in "Hot Swapping Disk Drives" on page 150). 2 Designate a new hot spare to protect the pools on that iSCSI Storage Appliance. Failed Disk Drive Not Protected by a Hot Spare When a pool is not protected by a hot spare, if a disk drive in that pool fails, remove and replace the failed disk drive. The controller detects the new disk drive and begins to rebuild the pool. For instance, when one of the disk drives fails in a RAID 1 pool, the pool is not automatically rebuilt. The failed disk drive must be removed and replaced before the pool can be rebuilt. If the controller fails to rebuild the pool, check that the cables, disk drives, and controllers are properly installed and connected. Failure in Multiple Pools Simultaneously If there's a disk drive failure in more than one pool at the same time (one failure per pool), and the pools have hot spares protecting them, the controller rebuilds the pools with these limitations: • A hot spare must be of equal or greater size than the failed disk drive it's replacing.