Hi folks.. Got a bit of a conundrum...
A friend has (had) a nas box that failed a drive in a raid 5 array during expansion of the array from 3 to 4 drives. The drive that failed was the 'new' one..
I've got the three drives here, and managed to get mdadm to create the array using:
mdadm --create /dev/md1 --assume-clean --level=5 --raid-devices=4 /dev/sda3 /dev/sdb3 /dev/sdc3 missing
fdisk says there is no valid partition on the resulting device /dev/md1 and photorec after many hours of trying only ever recovered some small fragments of mp3 files, some text files and some small images...
The drives have not been written to since the failure apart from me re-writing the superblocks per the above, but it was some what through expanding the array so who knows what state the data was in.
I'm assuming that the small / framented files found by photorec is a result of re-creating the array with incorrect geometry with respect to chunk size etc.
Anyone got any hot tips for this one? I did a bit of googling and forum reading and didn't really get all that far. The array came out of a QNAP TS-419P which I understand is an ext3/4 filesystem (depending on firmware version).
The other partitions of the drive when joined as arrays have the linux OS and system files for the QNAP intact, it's just the large storage array that's bust.
The owner is pretty much resigned to loosing the data (no backups, duh) but it'd be nice to pull a rabbit outa the hat.
Cheers, Chris H. _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
