Before using unraid i was using a synology nas. At some point i made backup on former hdds. 

For the backup the hdd used were in an usb enclosure plugged in the syno. They have been formatted with an ext4 partition.

I have a problem with one of the hdd. Unraid can't mount it because the superblock can't be found. I tried with backups indicated in e2fsck command with no luck.

The disk is a ST2000dm001-9YN164 with firmware CC4H

when listing partition on this disk fdisk finds one :

starts at 2048 

end at 3907029167

sectors 3907027120

size 1,8T

 83

linux

 

I have 2 others ST2000dm001 which are mounting with no problems; but they are 1CH164 model with CC43 firmware.

on these disks when listing partitions i find:

start at 256

end at 3907024064

sectors 3907023809

size 1,8T

83

linux

 

As all the disks have been partitionned in the same enclosure by dsm i think the partitions may have the exact same specs. (true at least for 2 of them).

Is it possible to tell the defective disk to use the same specs as the others to try recover the partition?

I tried to recover with testdisk (quick and deep search) with no luck

Both "start" LBA different 🤨

You try mount it by "Unassigned Devices" plugin ?

Edited May 27, 20206 yr by Benson

yes i tried. 

ThE 9YN164 model doesn't mount the others yes.

A partition is recognised but no superblock on the 9yn164.

 

edit: i thought as all the disk had been formatted in the same conditions the partitions would normally start and end within the same lba.

Edited May 27, 20206 yr by caplam

4 minutes ago, caplam said:

no superblock on the 9yn164

Missing that already mention.