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Date:      Tue, 21 Oct 2008 11:42:27 -0400
From:      Jerry McAllister <jerrymc@msu.edu>
To:        Per olof Ljungmark <peo@intersonic.se>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: need help with disklabel, "expected rawoffset 0, found 32"
Message-ID:  <20081021154227.GE43091@gizmo.acns.msu.edu>
In-Reply-To: <48FD8A90.5080007@intersonic.se>
References:  <48FD8A90.5080007@intersonic.se>

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On Tue, Oct 21, 2008 at 09:53:52AM +0200, Per olof Ljungmark wrote:

> Hi,
> 
> I think sysinstall? got it wrong here and I get the complaint in the
> subject line on boot. This is amd64 if that matters. Nothing edited by hand.
> 
> I must admit I don't fully understand what is going on here, "found 32"
> but the offsets are 63...
> 
> Filesystem on LSI controller amr(4):
> 
> # /dev/amrd0s1a:
> type: ESDI
> disk: amrd0s1
> label:
> flags:
> bytes/sector: 512
> sectors/track: 63
> tracks/cylinder: 255
> sectors/cylinder: 16065
> cylinders: 65535
> sectors/unit: 2929674240
> rpm: 3600
> interleave: 1
> trackskew: 0
> cylinderskew: 0
> headswitch: 0           # milliseconds
> track-to-track seek: 0  # milliseconds
> drivedata: 0
> 
> 8 partitions:
> #        size   offset    fstype   [fsize bsize bps/cpg]
>   a:  4194304       63    4.2BSD     2048 16384 28528
>   b:  8388608  4194367      swap
>   c: 2929661532       63    unused        0     0         # "raw" part,
> don't edit
>   d: 31457280 12582975    4.2BSD     2048 16384 28528
>   e:  2097152 44040255    4.2BSD     2048 16384 28528
>   f: 41943040 46137407    4.2BSD     2048 16384 28528
>   g: 2841581148 88080447    4.2BSD     2048 16384 28528
> bsdlabel: partition c doesn't start at 0!
> bsdlabel: partition c doesn't cover the whole unit!
> bsdlabel: An incorrect partition c may cause problems for standard
> system utilities

I do not know what is causing this, but I think the offset of the 'c'
partition (and the first real partition (a in this case)) should be 0
I have seen this a couple of times a long time ago and don't remember
what happened other than I think I just arbitrarily set those offsets 
to 0 and it worked.

Can you try booting up the fixit shell and hitting the disk with
a manual fdisk and bsdlabel to see what happens.  

Also, you might try doing the dd(1) thing  
  dd if=/dev/zero of=/dev/amrd0 bs=512 count=1000
before the fdisk and then another one after creating the slices manually
  dd if=/dev/zero of=/dev/amrd0s1 bs=512 count=1000
Note, that count value is arbitrary.

That should clean up any junk on the drive.

Also, I haven't seen/dealt with a disk device called amrd0 before.  It 
appears to be something from one of the raid setups?  So, maybe doing 
the dd thing might mangle that although, once it is a device, it 
should work the same as a drive.   I ain't rich enough to have one of
those raids to play with, though, so if someone else says otherwise,
believe them.

////jerry


> 
> 
> Filesystem on SmartArray controller ciss(4):
> 
> # /dev/da0s1d:
> type: SCSI
> disk: da0s1
> label:
> flags:
> bytes/sector: 512
> sectors/track: 63
> tracks/cylinder: 255
> sectors/cylinder: 16065
> cylinders: 53544
> sectors/unit: 860192344
> rpm: 3600
> interleave: 1
> trackskew: 0
> cylinderskew: 0
> headswitch: 0           # milliseconds
> track-to-track seek: 0  # milliseconds
> drivedata: 0
> 
> 8 partitions:
> #        size   offset    fstype   [fsize bsize bps/cpg]
>   c: 860184297       63    unused        0     0         # "raw" part,
> don't edit
>   d: 860184297       63    4.2BSD     2048 16384 28528
> bsdlabel: partition c doesn't start at 0!
> bsdlabel: partition c doesn't cover the whole unit!
> bsdlabel: An incorrect partition c may cause problems for standard
> system utilities
> 
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