I have a synology nas with an internal hdd (a 2TB wd ears). This drive has SMART errors.
I took the drive and build it in a external USB case. Then i booted Linux mint and tried to mount the data partition:
$ mount -t ext4 /dev/sdc5
[ 5875.123929] EXT4-fs (sdc5): VFS: Can't find ext4 filesystem
comment-1
Here is the detailed data, it is not sdb, it is sdc5.
[ 3986.299096] scsi 3:0:0:0: Direct-Access WDC WD20 EARS-00MVWB0 PQ: 0 ANSI: 2
...
[ 3993.436189] sdb: sdb1 sdb2 sdb3 < sdb5 >
...
[ 3993.519917] sd 3:0:0:0: [sdb] Attached SCSI disk
Device Boot Start End Blocks Id System
/dev/sdc1 256 4980735 2490240 fd Linux raid autodetect
/dev/sdc2 4980736 9175039 2097152 fd Linux raid autodetect
/dev/sdc3 9437184 3907015007 1948788912 f W95 Ext'd (LBA)
/dev/sdc5 9453280 3907015007 1948780864 fd Linux raid autodetect
I tried fsck.ext4 on the device without success:
...
the superblock is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
...
tried this:
e2fsck -b 8193 /dev/sdc5
--> same error.
Is it possible to rebuild the filesystem without doing damage to the data?
Best Answer
Are you sure the filesystem is on /dev/sdc? That would mean the disk would be unpartitioned with the filesystem taking up the entire disk. While that's perfectly possible, it's not that usual. Does mount /dev/sdc1 perhaps work? What does cat /proc/partitions say? Are you sure the disk shows up as sdc? If it's connected with USB, you can check the output of dmesg for instance.