[NILFS users] Can't mount nilfs - error searching super root.

[Milos Jana]

Hi again,

Looks like I'm unable to mount this drive again. It mounted successfully
several times after following your previous posts, but yesterday the problem
came back. I'm sure that I have been mounting/unmounting my pendrive
properly. This time fsck0.nilfs2 doesn't help - it hangs with "Searching the
latest checkpoint." message (see below).

user at laptop:~$ sudo mount /media/pendrive/
mount.nilfs2: Error while mounting /dev/sdb on /media/pendrive: Invalid
argument

user at laptop:~$ dmesg
...
[22429.446924] NILFS warning: Segment magic number invalid
[22429.446932] NILFS: error searching super root.

user at laptop:~/prog/sources/nilfs-utils-2.0.6$ sudo fsck0.nilfs2 /dev/sdb #
Nilfs-tools with first patch applied
Super-block:
  revision = 2.0, checksum = OK
  blocksize = 4096
  write time = 2009-01-22 23:40:19
  indicated partial segment: blocknr = 1966080
  segnum = 960, seq = 18266, cno=10169

Clean FS.

user at laptop:~/prog/sources/nilfs-utils-2.0.6$ sudo fsck0.nilfs2 /dev/sdb #
Nilfs-tools with additional patch applied
Super-block:
  revision = 2.0, checksum = OK
  blocksize = 4096
  write time = 2009-01-22 23:40:19
  indicated partial segment: blocknr = 1966080
  segnum = 960, seq = 18266, cno=10169

empty or bad segment: segnum = 960, blocknr = 1966080
The latest segment is lost. Trying rollback recovery..
.
Searching the latest checkpoint.    # here it hanged for like 10 minutes
until I killed it
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