Chapter 10: Solving Problems ● 67Failed Disk Drive Not Protected by a Hot SpareWhen a array is not protected by a hot spare, if a disk drive in that arrayfails, remove and replace the failed disk drive. The controller detects thenew disk drive and begins to rebuild the array.If the controller fails to rebuild the array, check that the cables, diskdrives, and controllers are properly installed and connected. Then, ifnecessary, use Adaptec Storage Manager to rebuild the array. Forinstructions, refer to the Adaptec Storage Manager User’s Guide or onlineHelp.Failure in Multiple Arrays SimultaneouslyIf there’s a disk drive failure in more than one array at the same time(one failure per array), and the arrays have hot spares protecting them,the controller rebuilds the arrays with these limitations:● A hot spare must be of equal or greater size than the failed disk driveit’s replacing.● Failed disk drives are replaced with hot spares in the order in whichthey failed. (The array that includes the disk drive that failed first isrebuilt first, assuming an appropriate hot spare is available—seebullet above.)If there are more disk drive failures than hot spares, see Failed DiskDrive Not Protected by a Hot Spare on page 67.If copyback is enabled, data is moved back to its original location oncethe controller detects that the failed drive has been replaced. (Copybackis an enhanced feature. See page 20.)Disk Drive Failure in a RAID 0 ArrayBecause RAID 0 volumes do not include redundancy, if a disk drive failsin a RAID 0 array, the data can’t be recovered.Correct the cause of the failure or replace the failed disk drives. Then,restore your data (if available).
