Date: Wed, 22 Feb 2006 22:23:13 -0500 From: "Dave" <dmehler26@woh.rr.com> To: <freebsd-hackers@freebsd.org> Subject: urgent, need to recover superblock! Message-ID: <015701c63828$7af60a70$0200a8c0@satellite>
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Hello,
Some urgency on this issue! I've got a 10 gb ide drive that has
critical data on one of it's
partitions /dev/ad1e. This drive was originally gmirrored in
another box it worked fine, it was the master drive. Now i've
installed this drive as a slave in another 6.0 box, and now it
shows up as ad1 with the partition i want being ad1e. I did a mount it
worked fine. So i knew the drive was working, i then unmounted the
partition, and tried to dump it to another drive. This didn't work, dump got
an error about incorrect superblock. I then did a mount
-o ro /dev/ad1e /mnt and i'm getting an error "Incorrect
superblock" from mount. I then tried fsck /dev/ad1e and got the
same error msg. These partitions were formatted with ufs2 as their
filesystem. I then ran bsdlabel ad1 and got a printout of my label,
this showed up which gives me hope that this data can be retrieved.
An error i'm getting from bsdlabel says that the c: partition does not cover
the
entire disk and that may result in utilities not working correctly. Any
help appreciated.
Some urgency!
Dave.
Script started on Sun Feb 19 07:56:47 2006
root@webserver:/dev#ls ad1*
ad1 ad1a ad1b ad1c ad1d ad1e ad1f ad1g
root@webserver:/dev#fdisk /dev/ad1
******* Working on device /dev/ad1 *******
parameters extracted from in-core disklabel are:
cylinders=19386 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=19386 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
root@webserver:/dev#bsdlabel /dev/ad1
# /dev/ad1:
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 266240 16 4.2BSD 2048 16384 16648
b: 524288 266256 swap
c: 19541024 0 unused 0 0 # "raw" part, don't
edit
d: 7340032 790544 4.2BSD 2048 16384 28552
e: 8388608 8130576 4.2BSD 2048 16384 28552
f: 2097152 16519184 4.2BSD 2048 16384 28552
g: 921600 18616336 4.2BSD 2048 16384 57608
bsdlabel: partition c doesn't cover the whole unit!
bsdlabel: An incorrect partition c may cause problems for standard system
utilities
exit
Script done on Sun Feb 19 08:02:34 2006
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