Failed Disk Drive Protected By A Hot Spare; Failed Disk Drive Not Protected By A Hot Spare; Failure In Multiple Arrays Simultaneously; Disk Drive Failure In A Raid 0 Array - Adaptec ASR-6805Q User Manual

• If it is a RAID 0 array, see
• If multiple disk drives fail within the same array, see
67.
• If the drive is part of the maxCache Container, see
Note: maxView Storage Manager uses the term logical drives or logical devices when
referring to arrays (see

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 first is rebuilt first, assuming an appropriate hot spare is
available—see bullet above.)
If there are more disk drive failures than hot spares, see
on page 67.
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
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
Utility on page 64), the command-line utility, ARCCONF, or maxView Storage Manager. For more
information, refer to the Adaptec RAID Controller Command Line Interface User's Guide and the maxView
Storage Manager User's Guide.
Proprietary and Confidential to PMC-Sierra, Inc.
Document No.: CDP-00277-02-A Rev. A, Issue:
Serial Attached SCSI RAID Controllers Installation and User's Guide
Disk Drive Failure in a RAID 0 Array
Failed SSD in maxCache Container
Terminology Used in this Guide
Understanding RAID
on page 67.
Multiple Failures in the Same Array
on page 14).
Failed Disk Drive Not Protected by a Hot Spare
on page 74), if more than one disk drive
About the Adaptec RAID Configuration
on page
on page 68.
67