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Old 11-18-2008, 07:27 PM   #1
Registered: Apr 2004
Distribution: Centos, Fedora
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Added hard drive to system, get superblock error at bootup.

I have a 1TB drive which I had connected via an external USB enclosure. It was formatted with ext3. I copied a bunch of data to it successfully, however I decided to connect it internally via SATA connection for faster transfers. I connected the drive internally to a SATA port and then I added following line to /etc/fstab:

/dev/sdb1 /media/1tbdrive ext3 defaults 1 2

I can access the drive fine if I type mount -a using this entry. I see the contents I copied over when it was connected via USB. However, when I reboot the system, I get a bad superblock message during bootup:

Checking filesystems:
fsck.ext3: /dev/sdb1:
The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device>

No such file or directory while trying to open /dev/sdb1
/boot: clean, 43/26104 files,15785/104388 blocks.

Any ideas on why I get that error message? I had to remove the entry for /dev/sdb1 from /etc/fstab so I could boot into the system. Again, I can manually mount it successfully once I'm in linux. It's just having the drive mounted during bootup which is the problem.

Below is some information on the drive, let me know if any more info is needed. Thanks!

root@new-host-5 ~]# fsck.ext3 -pv /dev/sdb1
/dev/sdb1: clean, 80841790/122109952 files, 225918280/244190000 blocks

[root@new-host-5 ~]# fdisk -l /dev/sdb

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 121601 976760001 83 Linux

[root@new-host-5 ~]# mke2fs -n /dev/sdb1
mke2fs 1.35 (28-Feb-2004)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
122109952 inodes, 244190000 blocks
12209500 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=247463936
7453 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848
Old 11-18-2008, 07:37 PM   #2
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Perhaps there are issues with the version of fsck (can't handle huge disk)?
Old 11-18-2008, 08:05 PM   #3
Registered: Apr 2004
Distribution: Centos, Fedora
Posts: 125

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Hmm, I don't think so as I formatted the disk on this system. I can also access it fine if I manually mount it.


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