Adaptec 2169400-R User Guide - Page 135

Recovering from a Disk Drive Failure, Failed Disk Drive Protected by a Hot Spare

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Chapter 13: Solving Problems ● 135 Recovering from a Disk Drive Failure When a disk drive fails for any reason, it is represented in Adaptec Storage Manager with a red X, as shown at right. This section explains how to recover when a disk drive fails: ● If the logical drive was protected by a hot spare (see the following section). ● If the logical drive was not protected by a hot spare (see page 136). ● If there is a disk drive failure in more than one logical drive simultaneously (see page 136). ● If it is a RAID 0 logical drive (see page 136). ● If multiple disk drives fail within the same logical drive (see page 137). Failed Disk Drive Protected by a Hot Spare When a logical drive is protected by a hot spare, if a disk drive in that logical drive fails the hot spare is automatically incorporated into the logical drive and takes over for the failed drive. For instance, when a disk drive fails in the RAID 5 logical drive shown in the next example, the logical drive is automatically rebuilt (its data is reconstructed) using the hot spare in place of the failed drive. You can't access the logical drive until the rebuilding is complete. Disk drive shows Failed status... ...hot spare takes over... ...and logical drive is rebuilt with hot spare. Note: In this example, the color of the hot spare changed from light-blue to dark-blue, showing that it is now part of a logical drive. To recover from the failure: 1 Remove and replace the failed disk drive (following manufacturer's instructions). 2 If copyback is not enabled-Remove the 'hot spare' designation from the original hot spare (the disk drive that was built into the logical drive). See page 84 for instructions. Then, designate a new hot spare to protect the logical drives 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. See Enabling Copyback on page 89 for more information.

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Chapter 13: Solving Problems
●
135
Recovering from a Disk Drive Failure
When a disk drive fails for any reason, it is represented in Adaptec Storage
Manager with a red X, as shown at right.
This section explains how to recover when a disk drive fails:
●
If the logical drive was protected by a hot spare (see the following section).
●
If the logical drive was
not
protected by a hot spare (see
page 136
).
●
If there is a disk drive failure in more than one logical drive simultaneously (see
page 136
).
●
If it is a RAID 0 logical drive (see
page 136
).
●
If multiple disk drives fail within the same logical drive (see
page 137
).
Failed Disk Drive Protected by a Hot Spare
When a logical drive is protected by a hot spare, if a disk drive in that logical drive fails the hot
spare is automatically incorporated into the logical drive and takes over for the failed drive.
For instance, when a disk drive fails in the RAID 5 logical drive shown in the next example, the
logical drive is automatically
rebuilt
(its data is reconstructed) using the hot spare in place of
the failed drive. You can’t access the logical drive until the rebuilding is complete.
Note:
In this example, the color of the hot spare changed from light-blue to dark-blue, showing that
it is now part of a logical drive.
To recover from the failure:
1
Remove and replace the failed disk drive (following manufacturer’s instructions).
2
If copyback is not enabled
—Remove the ‘hot spare’ designation from the original hot spare
(the disk drive that was built into the logical drive). See
page 84
for instructions. Then,
designate a new hot spare to protect the logical drives 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. See
Enabling Copyback
on page 89
for more information.
...and logical drive is rebuilt with hot spare.
Disk drive shows
Failed status...
...hot spare takes over...