Dear all,

Still  I can not solove the problem.
Maybe it is high time to give up,
but before that I wonder, 
as everybody who has had this kind of trouble does, 
I could mount it read-only and
back up my own data.
The data is too precious for me to lose...

Thank you for your support.

--
FK.

From: FK <[EMAIL PROTECTED]>
Subject: Re: How can I fix "Cannot find file system superblock" problem?
Date: Sun, 10 Dec 2006 15:27:56 +0900
Message-ID: <[EMAIL PROTECTED]>

fk> Dear all members,
fk> 
fk> From: [EMAIL PROTECTED]
fk> Subject: Re: How can I fix "Cannot find file system superblock" problem?
fk> Date: Sat, 09 Dec 2006 14:56:58 -0800
fk> Message-ID: <[EMAIL PROTECTED]>
fk> 
fk> perryh> > #diff -s sb1 sb2
fk> perryh> > Files sb1 and sb2 are identical
fk> perryh> > #diff -s sb1 sb3
fk> perryh> > Files sb1 and sb3 are identical
fk> perryh> 
fk> perryh> It might be worthwhile to check one of these identical "alternates"
fk> perryh> against the "real" superblock.  (AFAIK only the first 512 bytes, or
fk> perryh> less, actually matter.)  You might also post a dump of the first 512
fk> perryh> bytes and see if anyone notices anything.
fk> 
fk> Thank you for your reply. 
fk> Following your suggestions, I tried these.
fk> 
fk> #dd if=/dev/da0s2a skip=0 bs=512 count=16 of=sb0
fk> 16+0 records in
fk> 16+0 records out
fk> 8192 bytes transferred in 0.011918 secs (687360 bytes/sec)
fk> 
fk> #diff -s sb0 sb1
fk> Binary files sb0 and sb1 differ
fk> 
fk> Dump for the master superblock (the first 512 bytes only).
fk> #od -x sb0
fk> 0000000      d440    10fa    9b10    09e1    9524    7b55    f334    153f
fk> 0000020      f190    0b4a    387c    5d46    1b94    14b0    ae10    0b19
fk> 0000040      4e3c    b446    b870    138f    7190    0ab7    ff52    75e6
fk> 0000060      5dac    130e    bbf0    0a8a    0000    0000    0000    0000
fk> 0000100      0000    0000    0000    0000    0000    0000    0000    0000
fk> 0000120      1d12    7b57    1a88    113f    d610    0a84    a2be    064f
fk> 0000140      7eb8    1226    3290    0a44    9e3c    7b57    f870    0f9e
fk> 0000160      cb00    0932    cad0    7b57    1764    13e4    31d0    0ad4
fk> 0000200      0000    0000    0000    0000    0000    0000    4bfa    7b58
fk> 0000220      f54c    1243    41e0    0a4e    f1a6    41f0    d97c    13ef
fk> 0000240      eb00    0ad7    cd24    7b58    d334    10a3    66d0    09c8
fk> 0000260      be3c    6d39    7870    15ab    d1b0    0b6f    52be    7b59
fk> 0000300      3eb8    0fe3    4600    0973    0000    0000    0000    0000
fk> 0000320      0000    0000    0000    0000    0000    0000    0000    0000
fk> 0000340      007c    7b5a    3b94    1288    2820    0a65    f890    3fda
fk> 0000360      1440    15e3    b780    0b82    81a6    7b5a    197c    10e8
fk> 0000400      ed10    09da    0000    0000    0000    0000    0000    0000
fk> 0000420      2f66    7b5b    1658    138d    ed60    0ab5    0000    0000
fk> 0000440      0000    0000    0000    0000    b090    7b5b    f440    11ec
fk> 0000460      2d70    0a30    0000    0000    0000    0000    0000    0000
fk> 0000500      31ba    7b5c    d228    104c    cff0    09ad    5e4e    7b5c
fk> 0000520      f11c    1491    98e0    0b0f    ff52    78a4    5dac    11c6
fk> 0000540      18f0    0a23    e3e8    7b5c    5ca0    13d1    c3d0    0acd
fk> 0000560      0000    0000    0000    0000    0000    0000    6512    7b5d
fk> 0000600      3a88    1231    d3e0    0a47    0000    0000    0000    0000
fk> 0000620      0000    0000    e63c    7b5d    1870    1091    a8d0    09c1
fk> 0000640      9abe    514e    5eb8    1471    9230    0b04    0000    0000
fk> 0000660      0000    0000    0000    0000    93fa    7b5e    154c    1336
fk> 0000700      5920    0a98    2ae4    26ef    9010    14b5    c730    0b1b
fk> 0000720      1524    7b5f    f334    1195    8930    0a12    41ba    7b5f
fk> 0000740      1228    15db    daa0    0b7f    9abe    7b5f    5eb8    10d5
fk> 0000760      8f10    09d4    c2e4    7b5f    f010    143a    d4a0    0af1
fk> 
fk> Dump for one of alternative superblock (the first 512 bytes only).
fk> #od -x sb1
fk> 0000000      0000    0000    0000    0000    0028    0000    0030    0000
fk> 0000020      0038    0000    0bb8    0000    0000    0000    0000    0000
fk> 0000040      0000    0000    0000    0000    0000    0000    0033    0000
fk> 0000060      4000    0000    0800    0000    0008    0000    0008    0000
fk> 0000100      0000    0000    0000    0000    c000    ffff    f800    ffff
fk> 0000120      000e    0000    000b    0000    0008    0000    0800    0000
fk> 0000140      0003    0000    0002    0000    0800    0000    0000    0000
fk> 0000160      0000    0000    0800    0000    0040    0000    0000    0000
fk> 0000200      0000    0000    0000    0000    0000    0000    0000    0000
fk> 0000220      bf56    444b    a5bf    c858    0000    0000    0800    0000
fk> 0000240      4000    0000    0000    0000    0000    0000    0000    0000
fk> 0000260      0000    0000    0000    0000    5c00    0000    6f88    0001
fk> 0000300      0000    0000    0000    0000    0000    0000    0000    0000
fk> 0000320      0100    8000    0000    0000    0000    0000    0000    0000
fk> 0000340      0000    0000    0000    0000    0000    0000    0000    0000
fk> *
fk> 0001520      0000    0000    0000    0000    0000    0000    4000    0000
fk> 
fk> 
fk> Does my superblock have anything wrong?
fk> 
fk> This dump analysis is beyond my tecknical knowledge.
fk> So Thanks a lot for your help!
fk> 
fk> --
fk> FK.
fk> _______________________________________________
fk> freebsd-questions@freebsd.org mailing list
fk> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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