I want to mount a hard disk in remote debian server to retrieve some important data. The fdisk -l
info of the disk :
Disk /dev/sdc: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xd603e167 Device Boot Start End Sectors Size Id Type /dev/sdc1 2048 1953521663 1953519616 931.5G 6 FAT16
But when I try to mount it:
mount /dev/sdc1 /back
I get this error:
mount: wrong fs type, bad option, bad superblock on /dev/sdc1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so.
I have also tried
mount -t vfat /dev/sdc1 /back
and
mount -t ext4 /dev/sdc1 /back
But they all give the same error.
Also,
fsck /dev/sdc1
yields:
fsck from util-linux 2.29.2 e2fsck 1.43.4 (31-Jan-2017) ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap fsck.ext4: Group descriptors look bad... trying backup blocks... The filesystem size (according to the superblock) is 244190208 blocks The physical size of the device is 244189952 blocks Either the superblock or the partition table is likely to be corrupt! Abort<y>?
How can I solve this?
mount -o ro /dev/sdc /back
(note:sdc
, notsdc1
) and see what happens. Eventually you can examine the disk withtestdisk
, maybe this tool will find a filesystem somewhere.fdisk -l
shows isFAT16
. But I guess it should have been ext4, as it was formatted by Linux before. The syslog says:kernel: [24459.809995] EXT4-fs (sdc1): bad geometry: block count 244190208 exceeds size of device (244189952 blocks)
FAT16
becausemount
in Linux never does. The partition table is (should be) outside of any partition; when you pass/dev/sdc1
as an argument tomount
, it doesn't open/dev/sdc
to check the partition type.