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.

Regards,

Csaba Kos

On Fri, Jan 16, 2009 at 6:38 PM, Milos Jana <[email protected]> wrote:
> u...@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.
> u...@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 <[email protected]> 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:
>> >
>> > u...@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.
>> >
>> > u...@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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