Re: Can't mount nilfs - error searching super root.

[Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org>]

On Fri, 16 Jan 2009 19:22:46 +0900, "Csaba Kos" wrote:
> Hi!
> 
> Sorry to chime in uncalled, but I noticed that you are trying to mount
> "/dev/sdb".
> I have to admit that it has been a while since I last mounted a
> pendrive from the
> command line, so I might be wrong, but usually one mounts partitions
> on the device,
>  like "/dev/sdb1", and not the device itself.

No, no. That's OK.
NILFS does not overwrite the partition table block, so is available
for the device itself.
Of course, it's unless there's a bug for this usage ;)

Ryusuke
 
> Regards,
> 
> Csaba Kos
> 
> On Fri, Jan 16, 2009 at 6:38 PM, Milos Jana <milosdsax-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > user@laptop:~/prog/sources/nilfs-utils-2.0.6$ sudo fsck0.nilfs2 /dev/sdb
> > [sudo] password for user:
> > Super-block:
> >   revision = 2.0, checksum = OK
> >   blocksize = 4096
> >   write time = 2008-12-28 09:48:42
> >   indicated partial segment: blocknr = 4263936
> >   segnum = 2082, seq = 11746, cno=6661
> >
> > empty or bad segment: segnum = 2082, blocknr = 4263936
> > The latest segment is lost. Trying rollback recovery..
> > .
> > Searching the latest checkpoint.
> > Selected segment: blocknr = 4261888
> >   segnum = 2081, seq = 11745, cno=6660
> >   creation time = 2008-12-28 09:48:34
> > Do you wish to overwrite super block (y/N)? Y
> > Recovery will complete on mount.
> > user@laptop:~/prog/sources/nilfs-utils-2.0.6$ sudo mount /media/pendrive/
> > mount.nilfs2: Error while mounting /dev/sdb on /media/pendrive: Invalid
> > argument
> >
> > dmesg returns the same errors:
> > [ 553.003240] NILFS warning: Segment magic number invalid
> > [ 553.003248] NILFS: error searching super root.
> >
> > On Fri, Jan 16, 2009 at 8:55 AM, Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org> wrote:
> >>
> >> On Thu, 15 Jan 2009 19:10:19 +0100, "Milos Jana" wrote:
> >> > Nilfs-utils compiled properly with patch after following instructions
> >> > from
> >> > your previous post. Here is what came out:
> >> >
> >> > user@laptop:~$ sudo fsck0.nilfs2 /dev/sdb
> >> > Super-block:
> >> >   revision = 2.0, checksum = OK
> >> >   blocksize = 4096
> >> >   write time = 2008-12-28 09:48:42
> >> >   indicated partial segment: blocknr = 4263936
> >> >   segnum = 2082, seq = 11746, cno=6661
> >> >
> >> > Clean FS.
> >> >
> >> > user@laptop:~$ sudo mount /media/pendrive/
> >> > mount.nilfs2: Error while mounting /dev/sdb on /media/pendrive: Invalid
> >> > argument
> >>
> >> Hmm, that's weird.
> >>
> >> The partition was cleanly unmounted, but the final segment seems not
> >> to be written to the disk.
> >>
> >> Maybe, we need 'force' option to treat such situation.
> >>
> >> In the meatime, could you try the following (additional) patch?
> >>
> >> Regards,
> >> Ryusuke
> >> --
> >>
> >> diff --git a/sbin/mkfs/fsck0.nilfs2.c b/sbin/mkfs/fsck0.nilfs2.c
> >> index d3d335f..0d51e54 100644
> >> --- a/sbin/mkfs/fsck0.nilfs2.c
> >> +++ b/sbin/mkfs/fsck0.nilfs2.c
> >> @@ -905,10 +905,12 @@ static void nilfs_fsck(const char *device)
> >>        print_pseg_message(&pseg_ref, "    indicated partial segment");
> >>        fputc('\n', stderr);
> >>
> >> +#if 0
> >>        if (le16_to_cpu(sb.s_state) & NILFS_VALID_FS) {
> >>                fprintf(stderr, "Clean FS.\n");
> >>                goto out_clean;
> >>        }
> >> +#endif
> >>
> >>        if (nilfs_do_recovery(devfd, &pseg_ref) == 0)
> >>                goto out;
> >
> >
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