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From: "Uwe Grohnwaldt" <uwe@grohnwaldt.eu>
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Date: Wed, 1 Jun 2011 16:50:58 +0200
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Subject: AW: -CURRENT: mountroot failed
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Hi,

i have the same problem and setting kern.geom.part.check_integrity=3D0 =
works. I
installed my system using sysinstall from 8.2-amd64-CD1.

Ciao,
Uwe

--
Uwe Grohnwaldt

-----Urspr=FCngliche Nachricht-----
Von: owner-freebsd-current@freebsd.org
[mailto:owner-freebsd-current@freebsd.org] Im Auftrag von Andrey V. =
Elsukov
Gesendet: Montag, 16. Mai 2011 17:00
An: Michiel Boland
Cc: FreeBSD Current
Betreff: Re: -CURRENT: mountroot failed

On 16.05.2011 16:13, Michiel Boland wrote:
>> Can you send me a binary image of the first sector of ada0?
>> Also, output of `gpart list ada0` would be helpful.
> charlemagne# gpart list ada0
> Geom name: ada0
> modified: false
> state: OK
> fwheads: 16
> fwsectors: 63
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D> last: 1953525167
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D> first: 63
> entries: 4
> scheme: MBR
> Providers:
> 1. Name: ada0s1
>    Mediasize: 1000204648448 (931G)
>    Sectorsize: 512
>    Mode: r5w5e9
>    attrib: active
>    rawtype: 165
>    length: 1000204648448
>    offset: 16384
>    type: freebsd
>    index: 1
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D> end: 1953524735
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D> start: 32

Your partition has start offset below the first LBA.
As temporary workaround you can set loader tunable
kern.geom.part.check_integrity=3D0 (recently added to CURRENT)

> (Note that I partitioned the disk so that partition 1 starts at a=20
> multiple of 4096 bytes; this is one of those 4kb-sector disks that=20
> performs extremely badly if access is not aligned on a 4k boundary.)

What tool did you use for partitioning?

--
WBR, Andrey V. Elsukov