Adaptec 5405 User Guide - Page 140

Forcing a Logical Drive with Multiple Drive Failures Back Online - hot swap

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Chapter 11: Solving Problems ● 140 Forcing a Logical Drive with Multiple Drive Failures Back Online If multiple disk drives fail in the same logical drive, you may be able to recover the data by forcing the logical drive back online. For instance, if two drives fail in a RAID 5, forcing it online may allow you to access the data, depending on which disk drives failed. Caution: This procedure is not guaranteed to successfully recover your logical drive. The preferred and surest way to recover your data is to restore the failed logical drive from backup. Before using this procedure, check all connectors (cables, power, and so on), then try restoring the logical drive by performing a bus rescan or restarting the server. To force a logical drive online: 1 In the Logical Devices View, select the failed logical drive. 2 In the menu bar, select Actions, then click Force online. 3 Click Yes to confirm, then click OK. 4 If Adaptec Storage Manager successfully forces the logical drive online, check it for data and file system integrity. If some disks are still missing from the logical drive, reinsert or replace them and allow Adaptec Storage Manager to rebuild the logical drive. Then verify that drive status has returned to Optimal. Note: If the operation fails, follow the on-screen prompts to try the Advanced options for forcing the logical drive online. Only expert users should try the Advanced options. Removing a Failed Disk Drive's Icon Note: You can only complete this task on disk drives that are not included in any logical drive. When a disk drive fails, it may still appear in Adaptec Storage Manager although it is no longer available. To see an accurate representation of your storage space and make it easier to monitor your disk drives, you can remove a failed disk drive from the Physical Devices View. In the Physical Devices View, right-click the failed disk drive, then click Remove failed drive. Rebuilding Logical Drives A hot-swap rebuild occurs when a controller detects that a failed disk drive in a logical drive has been removed and then reinserted. To start a hot-swap rebuild: 1 Following manufacturer's instructions, gently pull the failed disk drive from the server without fully removing it, then wait for it to spin down fully before continuing. 2 If there is nothing wrong with the disk drive, reinstall it, following manufacturer's instructions. If necessary, replace the failed disk drive with a new disk drive of equal or larger size. 3 The controller detects the reinserted (or new) disk drive and begins to rebuild the logical drive.

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Chapter 11: Solving Problems
●
140
Forcing a Logical Drive with Multiple Drive Failures Back Online
If multiple disk drives fail in the same logical drive, you
may
be able to recover the data by
forcing the logical drive back online. For instance, if two drives fail in a RAID 5, forcing it
online may allow you to access the data, depending on which disk drives failed.
Caution:
This procedure is not guaranteed to successfully recover your logical drive. The
preferred and surest way to recover your data is to restore the failed logical drive from backup.
Before using this procedure, check all connectors (cables, power, and so on), then try restoring
the logical drive by performing a bus rescan or restarting the server.
To force a logical drive online:
1
In the Logical Devices View, select the failed logical drive.
2
In the menu bar, select
Actions
, then click
Force online
.
3
Click
Yes
to confirm, then click
OK
.
4
If Adaptec Storage Manager successfully forces the logical drive online, check it for data
and file system integrity. If some disks are still missing from the logical drive, reinsert or
replace them and allow Adaptec Storage Manager to rebuild the logical drive. Then verify
that drive status has returned to Optimal.
Note:
If the operation fails, follow the on-screen prompts to try the Advanced options for
forcing the logical drive online. Only expert users should try the Advanced options.
Removing a Failed Disk Drive’s Icon
Note:
You can only complete this task on disk drives that are not included in any logical drive.
When a disk drive fails, it may still appear in Adaptec Storage Manager although it is no longer
available. To see an accurate representation of your storage space and make it easier to monitor
your disk drives, you can remove a failed disk drive from the Physical Devices View.
In the Physical Devices View, right-click the failed disk drive, then click
Remove failed drive
.
Rebuilding Logical Drives
A
hot-swap rebuild
occurs when a controller detects that a failed disk drive in a logical drive has
been removed and then reinserted.
To start a hot-swap rebuild:
1
Following manufacturer’s instructions, gently pull the failed disk drive from the server
without fully removing it, then wait for it to spin down fully before continuing.
2
If there is nothing wrong with the disk drive, reinstall it, following manufacturer’s
instructions.
If necessary, replace the failed disk drive with a new disk drive of equal or larger size.
3
The controller detects the reinserted (or new) disk drive and begins to rebuild the logical
drive.