Using the Physical Disk Online command on select controllers
Does my controller support this feature? See Supported features.
If you do not have a suitable backup available, and if the failed disk is part of a virtual disk on a controller that supports the Online physical disk task, then you can attempt to retrieve data by selecting Online from the drop-down task menu of the failed disk.
The online command attempts to force the failed disk back into an online state. If you are able to force the disk into an online state, you may be able to recover individual files. The amount of data you can recover depends on the extent of disk damage. File recovery is only possible if a limited portion of the disk is damaged.
However, you may not be able to recover any data using this method. A forced Online does not fix a failed disk. You should not attempt to write new data to the virtual disk.
After retrieving any viable data from the disk, replace the failed disk as described previously in Replacing a Failed Disk that is part of a Redundant Virtual Disk or Replacing a failed Physical Disk that is part of a Non-Redundant Virtual Disk.