Adaptec 44300 Installation And User Manual

Also see for 48300: Datasheet Installation and user guide

Contents

Adaptec 44300 Installation And User Manual Manual pdf 51 page image

Chapter 11: Solving Problems ● 51Failed Disk Drive Not Protected by a Hot SpareWhen an array is not protected by a hot spare, if a disk drive in that array fails, remove andreplace the failed disk drive. The controller detects the new disk drive and begins to rebuild thearray.If the controller fails to rebuild the array, check that the cables, disk drives, and controllers areproperly installed and connected. Then, if necessary, use Adaptec Storage Manager to rebuildthe array. For instructions, refer to the Adaptec Storage Manager User’s Guide or online Help.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 theselimitations:● A hot spare must be of equal or greater size than the failed disk drive it’s replacing.● Failed disk drives are replaced with hot spares in the order in which they failed. (The arraythat includes the disk drive that failed first is rebuilt first, assuming an appropriate hotspare is available—see bullet above.)If there are more disk drive failures than hot spares, see Failed Disk Drive Not Protected by a HotSpare in previous section.Disk Drive Failure in a RAID 0 ArrayBecause RAID 0 volumes do not include redundancy, if a disk drive fails in a RAID 0 array, thedata can’t be recovered.Correct the cause of the failure or replace the failed disk drives. Then, restore your data (ifavailable).Multiple Failures in the Same ArrayIf more than one disk drive fails at the same time in the same RAID 1 array, the data can’t berecovered.Correct the cause of the failure or replace the failed disk drives. Then, restore your data (ifavailable).In some instances, RAID 10 arrays may survive multiple disk drive failures, depending onwhich disk drives fail. For more information, refer to the Adaptec Storage Manager User’s Guideor online Help.