Can't fsck e2fs on loop device

Pierre Habraken (Pierre.Habraken@imag.fr)
Wed, 11 Sep 1996 22:17:08 +0200

I am using a loopback device for building a compressed file system.
The loop device is configured as a module in a kernel 2.0.18.

When I fsck /tmp/rootfsfile, the file which contains my loop file
system, I get:

# fsck -v /tmp/rootfsfile
Parallelizing fsck version 0.5b (14-Feb-95)
e2fsck 0.5b, 14-Feb-95 for EXT2 FS 0.5a, 95/03/19
/tmp/rootfsfile is clean, no check.
#

If I fsck /mnt after having mounted the loop file system there (using
mount-2.5k), I get:

# fsck -v /mnt
Parallelizing fsck version 0.5b (14-Feb-95)
e2fsck 0.5b, 14-Feb-95 for EXT2 FS 0.5a, 95/03/19
fsck.ext2: Is a directory while trying to open /mnt

The filesystem superblock is corrupt. Try running e2fsck with an
alternate
superblock using the -b option. (8193 is commonly an alternate
superblock;
Hence, 'e2fsck -b 8193 <device>' may recover the filesystem.)
#

I also get this error message when I fsck /dev/ram which hosts my
compressed file system.

Any idea about this strange behavior ?

-- 
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Pierre HABRAKEN
e-mail : Pierre.Habraken@imag.fr
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