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Date:      Fri, 12 Oct 2001 23:44:06 -0400
From:      "Rob" <rob@thechain.com>
To:        "Rob" <rob@thechain.com>, <freebsd-fs@FreeBSD.ORG>, <questions@freebsd.org>
Subject:   RE: Boot error.. Corrupted file system?
Message-ID:  <NDBBIIBCOLNDLIHOJOHFMEHHCJAA.rob@thechain.com>
In-Reply-To: <NDBBIIBCOLNDLIHOJOHFGEHGCJAA.rob@thechain.com>

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err sorry didn't meen for multiple sends

-----Original Message-----
From: owner-freebsd-questions@FreeBSD.ORG
[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Rob
Sent: Friday, October 12, 2001 11:41 PM
To: freebsd-fs@FreeBSD.ORG; questions@freebsd.org
Subject: Boot error.. Corrupted file system?


I am writing this mailing list in a desperate attempt to find out how to
restore my hdd with out loosing all the data on it.  Recently I added two
additional hard drives to my freebsd 4.2 system.  Once I booted up my system
and dl'ed some things with wget a bunch of errors occurred resulting in
"kernel panic" and then system halt.  When I rebooted I get and error and
cannot boot freebsd

error:

Verifying DMI Pool Data .........
|
int=00000000  err=00000000  efl=00010246  eip=00001b2c
eax=00000002  ebx=00000002  ecx=00006564  edx=00000000
esi=00094cdc  edi=000022bf  ebp=00094cbc  esp=00094ca4
cs=002b  ds=0033  es=0033  fs=0033  gs=0033  gs=0033  ss=0033
cs:eip=f7 35 98 24 00 00 89 c7-89 f9 0f af 0d 9c 24 00
ss:esp=00 00 00 00 e0 4c 09 00-dc 4c 09 00 bf 22 00 00
BTX halted

to try to fix this problem I installed a minimal install of fbsd on another
hdd and ran
fsck /dev/ad1a which said this:
** /dev/ad1a
BAD SUPER BLOCK: VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST
ALTERNATE
/dev/ad1a: INCOMPLETE LABEL: type 4.2BSD fsize 0, frag 0, cpg 0, size
9809920


Although it doesn't really help I can still df -h it;
df /dev/ad1a prints:
Filesystem	Size	Used	Avail	Capacity	Mounted on
/dev/ad1a	4.5G	1.5G	2.7G	36%

fdisk /dev/ad1a prints:
*****Working on device /dev/ad1a *********
parameters extracted from in-core disklabel are:
cylinders=621 heads=255 sectors/track=63 (16065 blks/cyl)

parameters to be used for BIOS calclations are:
cylinders=621 heads=255 sectors/track=63 (16065 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,(FreeBSD/NetBSD/386BSD)
	start 0, size 50000 (24 meg), flag 80 (active)
		beg: cyl 0/ head 0/ sector 1;
		end:cyl 1023/ head 255/ sector 63


Is the data on my hdd completely unrecoverable? Is there anyway I could
mount the partion?

mount /dev/ad1a /blah (/blah is a directory) prints this:

mount: /dev/ad1a on /blah: incorrect super block


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