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I have a 500GB hard drive formatted as ext3: /dev/sdc1.

The disk utility does not even see this. This warning is from GParted:

e2label: No such device or address while trying to open /dev/sdc1
Couldn't find valid filesystem superblock.
Couldn't find valid filesystem superblock.

dump2fs 1.41.9 (22-Aug-2009)
dumpe2fs: No such device or address while trying to open /dev/sdc1

Unable to read contents of this file system?
Because of this some operations may be unavailable.

Did I lose something during the upgrade of the system? Was it the hard drive or the Ubuntu system that went bad?

fdisk -l output:

  Disk /dev/sda: 250.1 GB, 250059350016 bytes
     Device Boot      Start         End      Blocks   Id  System
  /dev/sda1   *           1       29164   234259798+  83  Linux
  /dev/sda2           29165       30401     9936202+   5  Extended
  /dev/sda5           29165       30401     9936171   82  Linux swap / Solaris

  Disk /dev/sdb: 500.1 GB, 500107862016 bytes
     Device Boot      Start         End      Blocks   Id  System
  /dev/sdb1               1       59322   476503933+  83  Linux
  /dev/sdb2           59323       60801    11880067+   5  Extended
  /dev/sdb5           59323       60801    11880036   82  Linux swap / Solaris

  Disk /dev/sdc: 500.1 GB, 500107862016 bytes
     Device Boot      Start         End      Blocks   Id  System
  /dev/sdc1               1       59152   475138408+  83  Linux
  /dev/sdc2           59153       60801    13245592+   5  Extended
  /dev/sdc5           59153       60801    13245561   82  Linux swap / Solaris

  Disk /dev/sdd: 500.1 GB, 500107862016 bytes
     Device Boot      Start         End      Blocks   Id  System
  /dev/sdd1               1       60801   488384001   83  Linux

GParted screenshot:

enter image description here

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Recompile the kernel. It is the only way. – ta.speot.is Apr 23 '10 at 8:35
2  
@taspeotis: Are you a troll or are you trying to do something like a...joke? I can't tell right now and I'd really like to now for the future... – Bobby Apr 23 '10 at 8:44
Could we please get the output of sudo fdisk -l? – Bobby Apr 23 '10 at 8:45
1  
changing kernels often changes the device used to address a harddrive. your drive probably isn't at /dev/sdc anymore -- maybe it's /dev/sda or /dev/sdb or /dev/sdx. you just have to figure out where it is now, and update whatever's trying to access it at the old device path. – quack quixote Apr 23 '10 at 9:03
@bobby its the sdc i want to remount without reformatting – Sean Apr 23 '10 at 9:03
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up vote 1 down vote accepted

The partition is still there, but seems to be damaged for some reason. You can try to run a check, likefsck.ext3 or e2fsck on it, which should be able to repair it.

If that fails, you can also try TestDisk for rescuing your data.

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what options would you recommend – Sean Apr 23 '10 at 9:34
@Sean: Something like fsck.ext3 -cf /dev/sdc1 should work. – Bobby Apr 23 '10 at 16:37
i got nothing with that, I then used testdisk and these instructions to use another superblock cgsecurity.org/wiki/Advanced_Find_ext2_ext3_Backup_SuperBlock it found about 10 superblocks but i got the same error message no matter which one i put in – Sean Apr 24 '10 at 21:56
@Sean: What is 'nothing'? – Bobby Apr 25 '10 at 15:41
sorry I had no luck mounting the drive while trying to use an alternate superblock – Sean Apr 26 '10 at 3:29
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