2010/2/22 Ryusuke Konishi <[email protected]>:
> Hi,
> On Mon, 22 Feb 2010 13:44:46 -0300, Edgard Pineda wrote:
>> Hi,
>>
>> I just had a 4 harddrives in raid5 with nilfs2 (kernel 2.6.32 and
>> nilfs-utils 2.0.15) and I've got a power cut, then I rebuilt the
>> array, but when I tried to mount the nilfs2 partition I've got:
>> "NILFS: Can't find nilfs on dev md0" (in dmesg) after execute
>> "mount.nilfs2: Error while mounting /dev/md0 on disk: Invalid
>> argument".
>>
>> Any idea? can I mount as "read only" to rescue some files? any tools
>> to "see" the files and fix the partition?
>>
>> Regards,
>> Edgard.
>
> Umm.., sounds serious. The message "NILFS: Can't find nilfs on xxx"
> is output when both of the two super blocks are broken.
>
> Can you dump the partition with hd command?
>
> # hd /dev/md0 | less
>
> If the partition is not filled yet, it would look like this:
>
> 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
> *
> 00000400 02 00 00 00 00 00 34 34 00 01 00 00 7b 93 80 d4 |......44....{...|
> 00000410 50 09 11 38 02 00 00 00 17 11 00 00 00 00 00 00 |P..8............|
> 00000420 00 5e 8f 8b 08 00 00 00 01 00 00 00 00 00 00 00 |.^..............|
> 00000430 00 08 00 00 05 00 00 00 79 00 00 00 00 00 00 00 |........y.......|
> 00000440 25 70 00 00 00 00 00 00 0e 00 00 00 00 00 00 00 |%p..............|
> 00000450 00 88 88 00 00 00 00 00 bb fb 7c 4b 00 00 00 00 |..........|K....|
> 00000460 71 d4 7f 4b 00 00 00 00 85 d4 7f 4b 00 00 00 00 |q..K.......K....|
> 00000470 03 00 32 00 01 00 01 00 bb fb 7c 4b 00 00 00 00 |..2.......|K....|
> 00000480 00 4e ed 00 00 00 00 00 00 00 00 00 0b 00 00 00 |.N..............|
> 00000490 80 00 20 00 c0 00 10 00 8f d2 a7 e6 99 7a 41 e8 |.. ..........zA.|
> 000004a0 ae 88 26 e1 48 0c a5 f4 00 00 00 00 00 00 00 00 |..&.H...........|
> 000004b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
> *
> 00001000 dd 21 ee fe 80 ad 4e a1 11 fa af 1e 38 00 07 00 |.!....N.....8...|
> 00001010 00 00 00 00 00 00 00 00 bb fb 7c 4b 00 00 00 00 |..........|K....|
> ...
>
>
> where "34 34" at offset 0x0406 is the magic number of NILFS.
>
> Regards,
> Ryusuke Konishi
>
:( I think I lost the files...
I get:
00000000 fc 00 0f 13 26 36 42 48 4d 49 46 41 3d 3c 3b 31 |....&6BHMIFA=<;1|
00000010 28 14 03 fc 00 0f 12 2a 39 45 4e 4f 4c 46 3f 3c |(......*9ENOLF?<|
00000020 3b 39 2b 21 14 03 fd 00 0f 03 21 28 3a 3f 45 47 |;9+!......!(:?EG|
00000030 43 41 3c 3b 34 29 25 13 03 fc 00 0e 19 29 39 43 |CA<;4)%......)9C|
00000040 48 49 48 40 3c 3a 34 2a 17 02 00 fd 00 0c 13 27 |HIH@<:4*.......'|
00000050 2a 3b 42 44 3f 35 37 36 2d 28 12 fc 00 0c 0b 19 |*;BD?576-(......|
00000060 22 2c 37 3f 44 3d 3a 33 28 18 0f fc 00 04 10 22 |",7?D=:3(......"|
00000070 29 35 38 fe 3c 02 37 2a 1e fb 00 09 12 25 28 2b |)58.<.7*.....%(+|
00000080 35 3b 39 2e 27 12 fc 00 08 10 1c 28 29 28 2e 2c |5;9.'......()(.,|
00000090 24 11 fc 00 06 0a 18 26 27 26 27 15 fb 00 04 13 |$......&'&'.....|
000000a0 24 27 1f 11 fb 00 03 12 27 28 13 fc 00 03 12 26 |$'......'(.....&|
000000b0 26 16 fd 00 00 13 15 22 27 1a 13 12 12 1e 24 26 |&......"'.....$&|
000000c0 24 24 26 28 21 22 20 41 60 70 78 77 77 fe 75 1b |$$&(!" A`pxww.u.|
000000d0 77 76 78 77 76 78 75 77 77 75 78 74 75 75 77 75 |wvxwvxuwwuxtuuwu|
000000e0 78 75 76 77 79 78 77 77 75 78 78 76 fd 78 12 76 |xuvwyxwwuxxv.x.v|
000000f0 78 77 77 78 79 79 77 78 78 77 78 78 76 78 77 78 |xwwxyywxxwxxvxwx|
00000100 78 76 fe 78 0b 79 78 77 78 79 79 78 79 77 78 79 |xv.x.yxwxyyxywxy|
00000110 78 fd 79 0d 76 78 79 7a 77 79 78 7a 78 77 79 7a |x.y.vxyzwyxzxwyz|
00000120 79 77 fe 79 01 78 77 fe 79 04 7a 79 77 7a 79 fe |yw.y.xw.y.zywzy.|
00000130 7a 00 7b fd 7a 00 7b fe 7a 01 7b 78 fe 7a ff 79 |z.{.z.{.z.{x.z.y|
00000140 01 77 79 fe 7a ff 7b 00 7a fe 7b fe 79 12 7a 7b |.wy.z.{.z.{.y.z{|
00000150 7b 79 79 7b 7b 7a 7a 7b 79 7a 7b 7b 7a 7a 79 79 |{yy{{zz{yz{{zzyy|
00000160 7a fe 7b ff 7a fd 7b fe 7a fc 7b 03 7c 7b 7b 7a |z.{.z.{.z.{.|{{z|
00000170 fe 7b ff 7c 04 79 7b 7b 7c 7b fe 7c 00 7b fe 7c |.{.|.y{{|{.|.{.||
00000180 12 7b 7d 7c 7d 7c 7d 7c 7c 7a 7d 7d 7c 7d 7c 7b |.{}|}|}||z}}|}|{|
...
but is there some tool to search for traces of files? or to rebuild
the superblock?
:(
Than you any way...
Regards,
Edgard.
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