When a disk drive or SSD fails for any reason, it is represented in Adaptec Storage Manager with a red X .
To Recover if the Logical Device is Protected by a Hot Spare:
When a logical device is protected by a hot spare, if a disk drive in that logical device fails the hot spare is automatically incorporated into the logical device and takes over for the failed drive.
For instance, when a disk drive fails in a RAID 5 logical device, the logical device is automatically rebuilt (its data is reconstructed) using the hot spare in place of the failed drive.
Note! In Adaptec Storage Manager, the color of the hot spare changes from light-blue to dark-blue, showing that it is now part of logical device.
To recover from the failure:
Remove and replace the failed disk drive.
Designate a new hot spare to protect the logical devices on that controller.
To Recover is the Logical Device is NOT Protected by a Hot Spare:
When a logical device is not protected by a hot spare, if a disk drive in that logical device fails, remove and replace the failed disk drive. The controller detects the new disk drive and begins to rebuild the logical device.
For instance, when one of the disk drives fails in a RAID 1 logical device, the logical device is not automatically rebuilt. The failed disk drive must be removed and replaced before the logical device can be rebuilt.
If the controller fails to rebuild the logical device, check that the cables, disk drives,and controllers are properly installed and connected.
To Recover from Simultaneous Drive Failures in Multiple Logical Devices:
If there’s a disk drive failure in more than one logical device at the same time (one failure per logical device), and the logical devices have hot spares protecting them, the controller rebuilds the logical devices 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 logical device that includes the disk drive that failed first is rebuilt first, assuming an appropriate hot spare is available.)
If there are more disk drive failures than hot spares, see "To Recover if the Logical Device is Not Protected by a Hot Spare”, above.
To Recover if it is a RAID 0 Logical Device:
Because RAID 0 volumes do not include redundancy, if a disk drive fails in a RAID 0 logical device, the data can not be recovered.
Correct the cause of the failure or replace the failed disk drives. Then, restore your data (if available).
To Recover if Multiple Drives Fail in the Same Logical Device:
If multiple disk drives fail in the same logical device, you may be able to recover the data by recreating the logical device in the wizard without the initialization step. Omitting the initialization step reconstructs the logical device meta-data without modifying or destroying other data on the disks.
Note! RAID 6 and RAID 60 logical devices support two simultaneous disk drive failures. In some instances, RAID 10 and RAID 50 logical devices may survive multiple disk drive failures, depending on which disk drives fail. See How RAID Protects Your Data for more information.
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.
To Recreate the Logical Device without Initialization:
Start the logical device wizard, select Custom, then click Next.
Choose the same RAID level as the original logical device, then click Next.
Select the same set of disk drives that comprised the original logical device.
Ensure that all Advanced settings are the same as the original logical device, click Skip initialization, then click Next. ( Show Me!)
Click Yes to confirm that you do not want to initialize the logical device.
Click Apply, then click Yes.
Adaptec Storage Manager begins building the logical device.
Check the logical device for data and file system integrity. If you still cannot access the data, initialize the physical drives (to erase the meta-data), then rebuild the logical device again without initialization, selecting the disk drives in a different order in Step 3. You may need to try several different orders before you can recover the data. (The order affects the striping of data on the disks.)
Note! In the Properties panel, uninitialized logical devices have the status “created without initialization”.
To Recover if the Drive Shows a S.M.A.R.T Event:
A S.M.A.R.T event indicates that a physical drive is about to fail. If the drive is part of a logical device, you should change the drive state to failed before removing the drive to eliminate the risk of losing data.
In the Physical Devices View, select the bad drive.
Right-click Set drive state to failed.
Click Yes to confirm.
Replace the bad drive. The controller detects the new disk drive and begins to rebuild the logical device.
Note! You can use this procedure to replace a drive for others reasons. For example, you may need to replace an unwarranted drive.
To Force a Logical Device with Multiple Drive Failures Back Online:
If multiple disk drives fail in the same logical device, you may be able to recover the data by forcing the logical device 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 device. The preferred and surest way to recover your data is to restore the failed logical device from backup. Before trying this procedure, check all connectors (cables, power, and so on ), try restoring the logical device by performing a bus rescan, or restart the server.
To Force a Logical Device Online:
In the Logical Devices View, select the failed logical device.
In the menu bar, select Actions, then click Force online.
Click Yes to confirm, then click OK.
If Adaptec Storage Manager successfully forces the logical device online, check it for data and file system integrity. If some disks are still missing from the logical device, reinsert or replace them and allow Adaptec Storage Manager to rebuild the logical device. 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 device online. Only expert users should try the Advanced options.
To Remove a Failed Disk Drive Icon:
Note! You can only complete this task on disk drives that are not included in any logical device.
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 select Remove failed drive.