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Date:      Thu, 22 Feb 2007 18:22:53 -0500
From:      "Marty Landman" <martster@gmail.com>
To:        freebsd-questions@freebsd.org
Subject:   Fwd: input/output error on hd
Message-ID:  <70063950702221522j5d52e79axe7a45cc7f28a3e0a@mail.gmail.com>
In-Reply-To: <70063950702221522i63b7e99fndc67c39678ac7fa6@mail.gmail.com>
References:  <70063950702221419s57a34f05p1bdee62713a67aae@mail.gmail.com> <6.0.0.22.2.20070222163157.0249d9f8@mail.computinginnovations.com> <70063950702221508v52abf24avf654482489cf2654@mail.gmail.com> <6.0.0.22.2.20070222171636.024f2ce0@mail.computinginnovations.com> <70063950702221522i63b7e99fndc67c39678ac7fa6@mail.gmail.com>

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Noooo, this is a 250 GB drive with tons of data (mostly bigger files) on it.

On 2/22/07, Derek Ragona < derek@computinginnovations.com> wrote:
>
>  Slice names are version dependent.  In major releases the names have
> changed a bit.
>
> There are a few recovery tools in the ports.  You can try those and see if
> they find any usable data.  Since it is only 24MB hopefully any data loss is
> minimal.
>
>         -Derek
>
>
> At 05:08 PM 2/22/2007, Marty Landman wrote:
>
> 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
>
>
> At 04:19 PM 2/22/2007, Marty Landman wrote:
>
> I wrote about this problem before, still working on recovery. After a
> power
> outage I lost my primary slave hd, a 250MB Maxtor. Got rebooted ok by
> editing it out of the fstab i.e.
>
> %cat /etc/fstab
> # Device                Mountpoint      FStype  Options         Dump
> Pass#
> /dev/ad0s1b             none            swap    sw              0       0
> /dev/ad0s1a             /               ufs     rw              1       1
> ...
> #/dev/ad1s1c            /hoss           ufs     rw              2       2
> %
>
> It's been explained to me that ad1s1c was an inappropriate name for the
> partition on this drive, will change that after fixing this mess.
>
> Here is a problem symptom summary:
>
> %sudo mount /dev/ad1s1c /hoss
> mount: /dev/ad1s1c: Input/output error
> %sudo mount /dev/ad1s1 /hoss
> mount: /dev/ad1s1: Input/output error
> %sudo fsck -f /dev/ad1s1
> fsck: Could not determine filesystem type
> %sudo fsck -f /dev/ad1s1c
> fsck: exec fsck_unused for /dev/ad1s1c in /sbin:/usr/sbin: No such file or
> directory
> %
>
> Have determined from dd's that there's data on here, wonder though if the
> power outage caused some permanent damage. Have isolated the errors to
> blocks 129 through 144:
>
> %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 0.008638 secs (59274 bytes/sec)
> %sudo dd if=/dev/ad1s1 of=/tmp/scratch bs=512 count=1 skip=128
> dd: /dev/ad1s1: Input/output error
> 0+0 records in
> 0+0 records out
> 0 bytes transferred in 1.315347 secs (0 bytes/sec)
> ... [repeats for skip=129 to skip=142]
> %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 1.336348 secs (0 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 0.018065 secs (28342 bytes/sec)
>
> So, I need to know what to do next. Have been looking for pertinant
> information to learn how to pick apart whatever's keeping my drive for
> being
> mountable and fix manually but either don't know what to look for or
> haven't
> found the right explanation yet.
>
> For instance, is it possible if I somehow 'eliminated' blocks 129 through
> 144 that the volume would then mount for me?
>
> Any help would be appreciated.
>
>
> Marty
>
>
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