Bug #44
Recovery of a Partially Formatted RAID1 NAS Hard Drive
Start date:
01/16/2013
Due date:
% Done:
100%
Estimated time:
Description
In the event of a hard disk failure in a RAID1 setup a rescue environment must be setup. I used D.E.F.T., but any linux with mdadm
will suffice. For best practices, make sure to ALWAYS LOAD FROM RAM.
This will only work in a RAID1 (mirrored) array; RAID0, RAID5, RAID6, and JBOD are structured differently. Run through steps as followed.
1. Boot into Linux and start a terminal session. (Start->Accessories->Terminal) (NOTE: must be root)¶
2. Run the command:¶
mdadm --assemble --scan --run
This will scan for RAID partitions, assemble previously created arrays, and run the array.
NOTE: The md partitions listed by this command will be the partitions you need to mount. The Largest partitions in usually the Data partition
UPDATE: I could not get the RAID array to mount properly, so recovery could not happen. I managed to ultimately fix this by running e2fsck on the mdPartition# like so:
e2fsck -y /dev/md2
3. Next the command:¶
mkdir /mnt/folder
This will make a directory in the
/mnt
folder that you name, as disignated by folder
.NOTE: if md partition is
/dev/md2
then make the directory /mnt/md2
4. Next the commant:¶
mount /dev/mdPartition# /mnt/folder
This will mount the partition to the directory that was specified earlier.
5. Open a file manager Start->Accessories->File Manager and
navigate to /mnt/folder
¶
Successful mounting will display stored data.
No data to display