Date: Mon, 21 Apr 1997 20:29:51 -0700 From: Scott Blachowicz <scott@apple.statsci.com> To: Doug White <dwhite@resnet.uoregon.edu> Cc: Kristian Kennaway <kkennawa@physics.adelaide.edu.au>, freebsd-questions@freebsd.org Subject: Re: Corrupted disk slice Message-ID: <m0wJWHA-0006uMC@apple.statsci.com> In-Reply-To: Your message of "Mon, 21 Apr 1997 19:15:14 -0700." <Pine.BSF.3.96.970421191426.23172G-100000@localhost> References: <Pine.BSF.3.96.970421191426.23172G-100000@localhost>
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Doug White <dwhite@gdi.uoregon.edu> wrote:
> On Tue, 22 Apr 1997, Kristian Kennaway wrote:
> > Can't open /dev/rwd1s4e: Invalid argument
> >
> > And dumped me into single-user mode. Trying to mount the partition manually
> > gives:
> >
> > [morden] 0:33 ~ mount -t ufs /dev/wd1s4e /usr2
> >
> > /dev/wd1s4e on /usr2: Incorrect super block.
>
> It's trying to mount a DOS logical disk in an extended partition. Make
> sure that /etc/fstab records this filesystem as a 'msdos' type FS.
I thought the logical slices started with s5 (regardless of how many
non-logical slices are currentlly being used).
Doing 'fdisk wd1' should show something similar to what 'fdisk wd0' shows on my system:
one:~% fdisk wd0
******* Working on device /dev/rwd0 *******
parameters extracted from in-core disklabel are:
cylinders=656 heads=128 sectors/track=63 (8064 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=656 heads=128 sectors/track=63 (8064 blks/cyl)
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 0 is:
sysid 6,(Primary 'big' DOS (> 32MB))
start 63, size 1048257 (511 Meg), flag 80
beg: cyl 0/ sector 1/ head 1;
end: cyl 129/ sector 63/ head 127
The data for partition 1 is:
sysid 5,(Extended DOS)
start 1048320, size 3144960 (1535 Meg), flag 0
beg: cyl 130/ sector 1/ head 0;
end: cyl 519/ sector 63/ head 127
The data for partition 2 is:
sysid 7,(OS/2 HPFS, QNX or Advanced UNIX)
start 4193280, size 677376 (330 Meg), flag 0
beg: cyl 520/ sector 1/ head 0;
end: cyl 603/ sector 63/ head 127
The data for partition 3 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 4870656, size 419328 (204 Meg), flag 0
beg: cyl 604/ sector 1/ head 0;
end: cyl 655/ sector 63/ head 127
It looks like fdisk shows partitions 0-3, but the slice numbers go from 1-4,
so adjust your numbers accordingly. That partition 1 of mine is my extended
partition and the 3 DOS partitions I have in there should be known as slices
5-7 from FreeBSD land. I haven't been brave enough to try mounting DOS
disks since the msdosfs code tickled some bugs that trashed my BSD
partitions on this drive's predecessor...but I think this info is right.
Scott Blachowicz Ph: 206/283-8802x240 Mathsoft (Data Analysis Products Div)
1700 Westlake Ave N #500
scott@statsci.com Seattle, WA USA 98109
Scott.Blachowicz@seaslug.org
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