Adaptec asr-6805e rohs kit [68/116] Failed disk drive protected by a hot spare
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Adaptec asr-6805e rohs kit [68/116] Failed disk drive protected by a hot spare

Adaptec asr-8805 sgl [68/116] Failed disk drive protected by a hot spare
• If multiple disk drives fail within the same array, see Multiple Failures in the Same Array on page
68.
• If the drive is part of the maxCache Device, see Failed SSD in maxCache Device on page 69.
Note: maxView Storage Manager uses the term logical drives or logical devices when
referring to arrays (see Terminology Used in this Guide on page 13).
Failed Disk Drive Protected by a Hot Spare
When an array is protected by a hot spare, if a disk drive in that array fails the hot spare is automatically
incorporated into the array and takes over for the failed drive.
To recover from the failure:
1. Remove and replace the failed disk drive.
2. If copyback is not enabled—In maxView Storage Manager, remove the ‘hot spare’ designation from
the original hot spare (the disk drive that was built into the array). Then, designate a new hot spare
to protect the arrays on that controller.
If copyback is enabled—Data is automatically moved back to its original location once the controller
detects that the failed drive has been replaced. No action is required.
Failed Disk Drive Not Protected by a Hot Spare
When an array is not protected by a hot spare, if a disk drive in that array fails, remove and replace the
failed disk drive. The controller detects the new disk drive and begins to rebuild the array.
If the controller fails to rebuild the array, check that the cables, disk drives, and controllers are properly
installed and connected. Make sure that the new disk drive is equal or greater in size than the failed
disk drive. Then, if necessary, use maxView Storage Manager to rebuild the array. For instructions, refer
to the maxView Storage Manager User’s Guide or online Help.
Failure in Multiple Arrays Simultaneously
If 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 drive it's replacing.
• Failed disk drives are replaced with hot spares in the order in which they failed. (The array that
includes the disk drive that failed rst is rebuilt rst, assuming an appropriate hot spare is
available—see bullet above.)
If there are more disk drive failures than hot spares, see Failed Disk Drive Not Protected by a Hot Spare
on page 68.
If copyback is enabled, data is moved back to its original location once the controller detects that the
failed drive has been replaced.
Disk Drive Failure in a RAID 0 Array
Because RAID 0 volumes do not include redundancy, if a disk drive fails in 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).
Multiple Failures in the Same Array
Except in RAID 6 and RAID 60 arrays (see Understanding RAID on page 75), if more than one disk drive
fails at the same time in the same array, the data normally can't be recovered.
You may be able to recover the data by forcing the logical drive online or by recreating the logical drive
without the initialization step. You can use the BIOS utility, ARC (see About the Adaptec RAID
Conguration Utility on page 65), the command-line utility, ARCCONF, or maxView Storage Manager.
68Proprietary and Condential to PMC-Sierra, Inc., and for its customers.
Document No.: CDP-00310-01-A Rev. A, Issue
Serial Attached SCSI RAID Controllers Installation and User's Guide

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