Subject: Re: hosed partition table
To: None <netbsd-users@netbsd.org>
From: George Georgalis <george@galis.org>
List: netbsd-users
Date: 10/23/2006 16:19:44
On Mon, Oct 23, 2006 at 04:15:29PM -0400, George Georgalis wrote:
>On Mon, Oct 23, 2006 at 06:11:06PM +0000, Christos Zoulas wrote:
>>In article <20061023143323.GA19828@run.galis.org>,
>>George Georgalis <george@galis.org> wrote:
>>>On Sun, Oct 22, 2006 at 08:57:18PM -0400, George Georgalis wrote:
>>>>While I was unloading a disk with errors, I noticed the partition
>>>>table was odd, I tried to fix it and now, basically the situation
>>>>can be reduced to the c and d partitions have been deleted.
>>>
>>>BTW - I DID get all the needed data off the drive before I started
>>>mucking with the partition table and this is the output of fdisk
>>>and disklabel
>>>
>>> $ fdisk wd1
>>>fdisk: DIOCGDEFLABEL: Inappropriate ioctl for device
>>>fdisk: DIOCGDINFO: Inappropriate ioctl for device
>>> $ disklabel wd1
>>>
>>>disklabel: Invalid signature in mbr record 0
>>>disklabel: ioctl DIOCGDINFO: Inappropriate ioctl for device
>>>
>>>I'm pretty sure this has nothing to do with the disk errors that
>>>started this journey. The system happens to be 3.1_RC2, but
>>>if needed, I could change this box easily enough. What other
>>>commands are available to doctor the disk?
>>
>>what does ls -l /dev/rwd1* say?
>
> $ ls -l /dev/rwd1*
>-rw-r--r-- 1 root wheel 267324504 Oct 21 18:31 /dev/rwd1
>crw-r----- 1 root operator 3, 8 Oct 20 16:50 /dev/rwd1a
>crw-r----- 1 root operator 3, 9 Sep 17 12:51 /dev/rwd1b
>crw-r----- 1 root operator 3, 10 Sep 17 12:51 /dev/rwd1c
>crw-r----- 1 root operator 3, 11 Sep 17 12:51 /dev/rwd1d
>crw-r----- 1 root operator 3, 12 Sep 17 12:51 /dev/rwd1e
>crw-r----- 1 root operator 3, 13 Sep 17 12:51 /dev/rwd1f
>crw-r----- 1 root operator 3, 14 Sep 17 12:51 /dev/rwd1g
>crw-r----- 1 root operator 3, 15 Sep 17 12:51 /dev/rwd1h
>crw-r----- 1 root operator 3, 524296 Sep 17 12:51 /dev/rwd1i
>crw-r----- 1 root operator 3, 524297 Sep 17 12:51 /dev/rwd1j
>crw-r----- 1 root operator 3, 524298 Sep 17 12:51 /dev/rwd1k
>crw-r----- 1 root operator 3, 524299 Sep 17 12:51 /dev/rwd1l
>crw-r----- 1 root operator 3, 524300 Sep 17 12:51 /dev/rwd1m
>crw-r----- 1 root operator 3, 524301 Sep 17 12:51 /dev/rwd1n
>crw-r----- 1 root operator 3, 524302 Sep 17 12:51 /dev/rwd1o
>crw-r----- 1 root operator 3, 524303 Sep 17 12:51 /dev/rwd1p
>
>>Also does disklabel -I -i /dev/rwd1d work?
>
>$ disklabel -I -i /dev/rwd1d
>disklabel: Invalid signature in mbr record 0
ahem, excuse me. disklabel did start...
$ disklabel -I -i /dev/rwd1d
disklabel: Invalid signature in mbr record 0
partition> P
4 partitions:
# size offset fstype [fsize bsize cpg/sgs]
a: 390721968 0 4.2BSD 0 0 0 # (Cyl. 0 - 387620)
d: 390721968 0 unused 0 0 # (Cyl. 0 - 387620
The last time I wrote this info, I was having trouble creating c
with the propper size (entire disk) less 63s offset.
// Goeorge
--
George Georgalis, systems architect, administrator <IXOYE><