User Manual

635
Product Manual Troubleshooting
rebuilding A disk ArrAy
When you rebuild a disk array, you are actually rebuilding the data on one physical drive.
• Whenaphysicaldriveinadiskarrayfailsandasparedriveofadequatecapacityisavailable,thedisk
arraybeginstorebuildautomaticallyusingthesparedrive.
• Ifthereisnosparedriveofadequatecapacity,buttheAutoRebuildfunctionisENABLED,thediskarray
beginstorebuildautomaticallyassoonasyouremovethefailedphysicaldriveandinstallanuncongured
physicaldriveinthesameslot.See“MakingRebuildSettings”onpage152.
•
IfthereisnosparedriveofadequatecapacityandtheAutoRebuildfunctionisDISABLED,youmust
replacethefaileddrivewithanunconguredphysicaldrive,thenperformaManualRebuild.See
“RebuildingaDiskArray”onpage195.
incOMPlete ArrAy
A more serious, but far less common problem is an Incomplete Array. An in-complete array results from a
physical drive that fails or becomes missing during:
•
RAIDlevelmigration
• Diskarraytransport
Migration
Normally, if a physical drive or the controller fails during migration, the disk array goes critical, and you can
rebuild it.
Transport
Transport is the action of moving the physical drives of a disk array:
•
Todifferentslotsinthesameenclosure
• Fromoneenclosuretoanother
Important
If your replacement disk drive was formerly part of a different disk array or
logical drive, you must clear the conguration data on the replacement drive
before you use it. See “Clearing a Stale or a PFA Condition” on page 186..