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Date:      Tue, 22 Sep 2009 11:47:00 -0700
From:      Ted Faber <faber@isi.edu>
To:        Dimitry Andric <dimitry@andric.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: RELENG_8 regression: cannot detect partitions (now with boot -v)
Message-ID:  <20090922184700.GE38036@zod.isi.edu>
In-Reply-To: <4AB90D2B.30801@andric.com>
References:  <20090921201903.GB52169@zod.isi.edu> <20090922041055.GA29399@zod.isi.edu> <4AB8AB12.7010406@andric.com> <20090922151441.GA38036@zod.isi.edu> <4AB90D2B.30801@andric.com>

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On Tue, Sep 22, 2009 at 07:45:15PM +0200, Dimitry Andric wrote:
> On 2009-09-22 17:14, Ted Faber wrote:
> > That's the USB disk label I was using to get the boot from.  The slices
> > on ad0: /dev/ad0s1a /dev/ad0s1d and /dev/ad0s1e are the ones I don't
> > see.
>=20
> Just checking. :)  Can you run (from a rescue disk or 7-STABLE):
>=20
>   dd if=3D/dev/ad2 count=3D4 2>/dev/null | hexdump -C
>=20
> and post the output here?  Output of fdisk and bsdlabel would also be
> handy.

The bsdlabel and fdisk were attached to the first message, but I've
attached them here as well, along with the output of=20

$ dd if=3D/dev/ad0 count=3D4 2>/dev/null | hexdump -C

from the running 7.2 install.  7.2 finds the disk as ad0 not ad2.

I've also gotten a pointer to this message, which sounds a lot like my
problem:

http://docs.freebsd.org/cgi/getmsg.cgi?fetch=3D774931+0+archive/2009/freebs=
d-current/20090118.freebsd-current

I'm planning to save that sector and then try erasing it as the message
suggests when I get access to the machine tonight.  If the output from
the dd above will confirm that diagnosis, that would be great.  I don't
know what a stale disklabel looks like, myself...

Thanks!


--=20
Ted Faber
http://www.isi.edu/~faber           PGP: http://www.isi.edu/~faber/pubkeys.=
asc
Unexpected attachment on this mail? See http://www.isi.edu/~faber/FAQ.html#=
SIG

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00000000  fc 31 c0 8e c0 8e d8 8e  d0 bc 00 7c 89 e6 bf 00  |.1.........|....|
00000010  06 b9 00 01 f3 a5 89 fd  b1 08 f3 ab fe 45 f2 e9  |.............E..|
00000020  00 8a f6 46 bb 20 75 08  84 d2 78 07 80 4e bb 40  |...F. u...x..N.@|
00000030  8a 56 ba 88 56 00 e8 fc  00 52 bb c2 07 31 d2 88  |.V..V....R...1..|
00000040  6f fc 0f a3 56 bb 73 19  8a 07 bf 87 07 b1 03 f2  |o...V.s.........|
00000050  ae 74 0e b1 0b f2 ae 83  c7 09 8a 0d 01 cf e8 c5  |.t..............|
00000060  00 42 80 c3 10 73 d8 58  2c 7f 3a 06 75 04 72 05  |.B...s.X,.:.u.r.|
00000070  48 74 0d 30 c0 04 b0 88  46 b8 bf b2 07 e8 a6 00  |Ht.0....F.......|
00000080  be 7b 07 e8 b2 00 8a 56  b9 4e e8 8e 00 eb 05 b0  |.{.....V.N......|
00000090  07 e8 b0 00 30 e4 cd 1a  89 d7 03 7e bc b4 01 cd  |....0......~....|
000000a0  16 75 0d 30 e4 cd 1a 39  fa 72 f2 8a 46 b9 eb 16  |.u.0...9.r..F...|
000000b0  30 e4 cd 16 88 e0 3c 1c  74 f1 2c 3b 3c 04 76 06  |0.....<.t.,;<.v.|
000000c0  2c c7 3c 04 77 c9 98 0f  a3 46 0c 73 c2 88 46 b9  |,.<.w....F.s..F.|
000000d0  be 00 08 8a 14 89 f3 3c  04 9c 74 0a c0 e0 04 05  |.......<..t.....|
000000e0  be 07 93 c6 07 80 53 f6  46 bb 40 75 08 bb 00 06  |......S.F.@u....|
000000f0  b4 03 e8 59 00 5e 9d 75  06 8a 56 b8 80 ea 30 bb  |...Y.^.u..V...0.|
00000100  00 7c b4 02 e8 47 00 72  86 81 bf fe 01 55 aa 0f  |.|...G.r.....U..|
00000110  85 7c ff be 85 07 e8 19  00 ff e3 b0 46 e8 24 00  |.|..........F.$.|
00000120  b0 31 00 d0 eb 17 0f ab  56 0c be 78 07 e8 eb ff  |.1......V..x....|
00000130  89 fe e8 03 00 be 85 07  ac a8 80 75 05 e8 04 00  |...........u....|
00000140  eb f6 24 7f 53 bb 07 00  b4 0e cd 10 5b c3 8a 74  |..$.S.......[..t|
00000150  01 8b 4c 02 b0 01 56 89  e7 f6 46 bb 80 74 13 66  |..L...V...F..t.f|
00000160  6a 00 66 ff 74 08 06 53  6a 01 6a 10 89 e6 48 80  |j.f.t..Sj.j...H.|
00000170  cc 40 cd 13 89 fc 5e c3  20 20 a0 0a 44 65 66 61  |.@....^.  ..Defa|
00000180  75 6c 74 3a a0 0d 8a 00  05 0f 01 06 07 0b 0c 0e  |ult:............|
00000190  83 a5 a6 a9 0d 0c 0b 0a  09 08 0a 0e 11 10 01 3f  |...............?|
000001a0  bf 44 4f d3 4c 69 6e 75  f8 46 72 65 65 42 53 c4  |.DO.Linu.FreeBS.|
000001b0  66 bb 44 72 69 76 65 20  b1 00 80 0f b6 00 80 01  |f.Drive ........|
000001c0  01 00 a5 0e ff ff 3f 00  00 00 42 45 1c 1d 00 00  |......?...BE....|
000001d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
00000200  57 45 56 82 00 00 00 00  61 6d 6e 65 73 69 61 63  |WEV.....amnesiac|
00000210  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000220  00 00 00 00 00 00 00 00  00 02 00 00 3f 00 00 00  |............?...|
00000230  10 00 00 00 a9 64 07 00  f0 03 00 00 70 59 1c 1d  |.....d......pY..|
00000240  00 00 00 00 00 00 00 00  10 0e 01 00 00 00 00 00  |................|
00000250  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000280  00 00 00 00 57 45 56 82  19 0d 08 00 00 20 00 00  |....WEV...... ..|
00000290  00 00 00 00 60 59 1c 1d  10 00 00 00 00 00 00 00  |....`Y..........|
000002a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000002b0  00 00 00 00 70 59 1c 1d  00 00 00 00 00 00 00 00  |....pY..........|
000002c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000800

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******* Working on device /dev/ad0 *******
parameters extracted from in-core disklabel are:
cylinders=484521 heads=16 sectors/track=63 (1008 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=484521 heads=16 sectors/track=63 (1008 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 488392002 (238472 Meg), flag 80 (active)
	beg: cyl 0/ head 1/ sector 1;
	end: cyl 1023/ head 14/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>

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# /dev/ad0s1:
8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:  4194304        0    4.2BSD        0     0     0=20
  b: 20971520  4194304      swap                   =20
  c: 488392002        0    unused        0     0         # "raw" part, don'=
t edit
  d: 41943040 25165824    4.2BSD     2048 16384 28552=20
  e: 421283138 67108864    4.2BSD        0     0     0=20

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