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Date:      Thu, 22 Feb 2007 18:12:48 -0500
From:      "Marty Landman" <martster@gmail.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: input/output error on hd
Message-ID:  <70063950702221512j2e8b5700wa66cc08f316af8a3@mail.gmail.com>
In-Reply-To: <70063950702221508v52abf24avf654482489cf2654@mail.gmail.com>
References:  <70063950702221419s57a34f05p1bdee62713a67aae@mail.gmail.com> <6.0.0.22.2.20070222163157.0249d9f8@mail.computinginnovations.com> <70063950702221508v52abf24avf654482489cf2654@mail.gmail.com>

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Thanks Derek,

I tried deleting and recreating the one slice on that drive in sysinstall,
also rewriting the boot label. Didn't seem to help as shown:

%sudo fdisk ad1cs1
******* Working on device /dev/ad1cs1 *******
parameters extracted from in-core disklabel are:
cylinders=486332 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=486332 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:
<UNUSED>
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 0, size 50000 (24 Meg), flag 80 (active)
        beg: cyl 0/ head 0/ sector 1;
        end: cyl 1023/ head 254/ sector 63
%sudo fsck /dev/ad1cs1
fsck: Could not determine filesystem type
%sudo fsck /dev/ad1c
fsck: exec fsck_unused for /dev/ad1c in /sbin:/usr/sbin: No such file or
directory
%sudo mount /dev/ad1cs1 /hoss
mount: /dev/ad1cs1: Input/output error
%sudo mount /dev/ad1c /hoss
mount: /dev/ad1c on /hoss: incorrect super block
%sudo dd if=/dev/ad1s1 of=/tmp/scratch bs=512 count=1 skip=131
dd: /dev/ad1s1: Input/output error
0+0 records in
0+0 records out
0 bytes transferred in 1.199710 secs (0 bytes/sec)
%sudo dd if=/dev/ad1s1 of=/tmp/scratch bs=512 count=1 skip=127
1+0 records in
1+0 records out
512 bytes transferred in 0.018295 secs (27986 bytes/sec)
%sudo dd if=/dev/ad1s1 of=/tmp/scratch bs=512 count=1 skip=144
1+0 records in
1+0 records out
512 bytes transferred in 0.024593 secs (20819 bytes/sec)
%sudo dd if=/dev/ad1s1 of=/tmp/scratch bs=512 count=1 skip=143
dd: /dev/ad1s1: Input/output error
0+0 records in
0+0 records out
0 bytes transferred in 1.319451 secs (0 bytes/sec)
%

Wonder why it renamed my slice from ad1s1c to ad1cs1, and what I can do from
here.

Marty

On 2/22/07, Derek Ragona <derek@computinginnovations.com> wrote:
>
>  You may have lost the partition table.  You can try repartitioning the
> drive but do NOT do a newfs.  You can easily try it in sysinstall.
>
>         -Derek
>



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