Can't read superblock

**WhoNeedszzz** · June 27th, 2008

Hey there.

When I try and mount my drive i get this:

Code:

$ mount /dev/sdb1 /media/sdb1
mount: /dev/sdb1: can't read superblock

This happened after I created a second partition from an existing partition by resizing.

The results of fsck.vfat are:

Code:

$ sudo fsck.vfat /dev/sdb1
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
/
  Contains a free cluster (2). Assuming EOF.
FAT32 root dir starts with a bad cluster!

The results of trying to repair the disk in gparted are:

Code:

Bad FAT: unterminated chain for \VIRTUA~1. You should run dosfsck or scandisk.

Note: I can mount the second partition (ext3) just fine. It is just the first partition that won't mount. For clarification the first partition is FAT32.

Thanks in advanced.

**iaculallad** · June 27th, 2008

Originally Posted by WhoNeedszzz

Hey there.

When I try and mount my drive i get this:

Code:

$ mount /dev/sdb1 /media/sdb1
mount: /dev/sdb1: can't read superblock

This happened after I created a second partition from an existing partition by resizing.

The results of fsck.vfat are:

Code:

$ sudo fsck.vfat /dev/sdb1
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
/
  Contains a free cluster (2). Assuming EOF.
FAT32 root dir starts with a bad cluster!

The results of trying to repair the disk in gparted are:

Code:

Bad FAT: unterminated chain for \VIRTUA~1. You should run dosfsck or scandisk.

Note: I can mount the second partition (ext3) just fine. It is just the first partition that won't mount. For clarification the first partition is FAT32.

Thanks in advanced.

Post your /etc/fstab file:

Code:

cat /etc/fstab

and

Code:

sudo fdisk -l

**WhoNeedszzz** · June 27th, 2008

Code:

$ cat /etc/fstab
# /etc/fstab: static file system information.
#
#  -- This file has been automaticly generated by ntfs-config -- 
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc /proc proc defaults 0 0
# Entry for /dev/sda2 :
UUID=294236ad-36b8-40ee-ac2b-c2eda3b5ed8a / ext3 defaults,errors=remount-ro 0 1
# Entry for /dev/sda3 :
UUID=908d45dd-6c2e-4239-aded-2b9ae1d8ed39 none swap sw 0 0
/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/hdb /media/cdrom1 udf,iso9660 user,noauto 0 0
#Added by diskmounter utility
/dev/sda1 /media/sda1 vfat rw,user,fmask=0111,dmask=0000 0 0
#Added by diskmounter utility
/dev/sdb1 /media/sdb1 vfat rw,user,fmask=0111,dmask=0000 0 0
#Added by diskmounter utility
/dev/sdc2 /media/sdc2 vfat rw,user,fmask=0111,dmask=0000 0 0

Code:

$ sudo fdisk -l 
Disk /dev/sda: 80.0 GB, 80000000000 bytes
255 heads, 63 sectors/track, 9726 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0000d4c6

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        3851    30933126    c  W95 FAT32 (LBA)
/dev/sda2            3852        9601    46186875   83  Linux
/dev/sda3            9602        9726     1004062+  82  Linux swap / Solaris

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x7027ed42

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       58843   472656366    b  W95 FAT32
/dev/sdb2           58844       60801    15727635   83  Linux

Disk /dev/sdc: 4095 MB, 4095737344 bytes
255 heads, 63 sectors/track, 497 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x20202020

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1           5       40131    0  Empty
/dev/sdc2               6         497     3951990    b  W95 FAT32

**WhoNeedszzz** · June 29th, 2008

The problem has been solved by myself.For help for other people, FAT 1 & 2 got corrupted when i resized the partition and i fixed it (but had to delete the corrupted dirs) by running testdisk and finding the "Repair FAT" option. After that I had to run fsck to cleanup the now removable corruption. Thanks for the help any way.

**DouglasAWh** · July 9th, 2011

Originally Posted by WhoNeedszzz

The problem has been solved by myself.For help for other people, FAT 1 & 2 got corrupted when i resized the partition and i fixed it (but had to delete the corrupted dirs) by running testdisk and finding the "Repair FAT" option. After that I had to run fsck to cleanup the now removable corruption. Thanks for the help any way.

How did you know what partition table type you had? I'm assuming I have EFI, but I have no idea.