Date: Mon, 18 Feb 2002 21:09:33 -0500 From: Glenn Becker <chexmix@burningclown.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: partitions, disklabel, etc. Message-ID: <20020219020933.GA884@burningclown.com>
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Hi,
I've got a dual boot Debian GNU/Linux and FreeBSD 4.5 installation on
an older Toshiba laptop (Satellite Pro 470CDT). Lately I've been
concerned about some messages upon bootup (relevant part of dmesg
output reproduced below) where the Linux hunks of the hard drive are
picked out as being invalid.
Honestly, I'm not sure why they are showing up there at all. But I
think the problem(s) may originate with my stupid deletion of my
Linux swap partition and my subsequent replacement of that same
partition -- I recall reading in a FreeBSD + Linux Mini-HOWTO that
a) one has to put FreeBSD =after= Linux on an HD and b) it's best
not to muck with the Linux partitions after the dual-OS system is
set up.
I've had no problems (yet) with either system, but have been trying
to research it to see if I can fix it WITHOUT reinstalling both OSs
from scratch (I'd like to avoid this and the wear on the lappy's CD
drive if possible). Some other weird stuff has popped up.
If I run disklabel -r command on /dev/ad0, I get this:
disklabel: bad pack magic number (label is damaged, or pack is
unlabeled)
Without -r, I get something completely different, which I reproduce
at the end of this message.
The output of fdisk (see below) also seems completely screwed up -
it shows all three partitions on the drive as beginning and ending
at the same CHS spot: cyl 1023/ head 254/ sector 63. This seems
like a cylinder 1024 thang? Mebbe?
Soooo, I'm wondering: 1) should I create a disklabel for /dev/ad0,
or will this totally bork all my Linux stuff? 2) can I simply
-delete- the device files /dev/ad0s1* and /dev/ad0s2*, since I'm
not using them for anything in FreeBSD? Or not?
In short, how do I fix this thing? Or do I?
Thanks for any enlightenment and apologies for the length.
Glenn Becker
%%%%%% RELEVANT lines from dmesg %%%%%%%%%%%
Mounting root from ufs:/dev/ad0s3a
ad0s1: raw partition size != slice size
ad0s1: start 63, end 27342629, size 27342567
ad0s1c: start 63, end 30716279, size 30716217
ad0s1: truncating raw partition
ad0s1: rejecting partition in BSD label: it isn't entirely within the slice
ad0s1: start 63, end 27342629, size 27342567
ad0s1f: start 414367, end 30716279, size 30301913
ad0s2: raw partition size != slice size
ad0s2: start 27342630, end 27599669, size 257040
ad0s2c: start 27342630, end 58605119, size 31262490
ad0s2: truncating raw partition
ad0s2: rejecting partition in BSD label: it isn't entirely within the slice
ad0s2: start 27342630, end 27599669, size 257040
ad0s2b: start 27445030, end 27715973, size 270944
ad0s2: rejecting partition in BSD label: it isn't entirely within the slice
ad0s2e: start 27715974, end 27756933, size 40960
ad0s2: rejecting partition in BSD label: it isn't entirely within the slice
ad0s2f: start 27756934, end 58605119, size 30848186
%%%%%%%%%%OUTPUT of disklabel /dev/ad0 %%%%%%%%%%%
# /dev/ad0:
type: unknown
disk: amnesiac
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 3648
sectors/unit: 58605120
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
c: 58605120 0 unused 0 0 # (Cyl. 0 - 3647)
%%%%OUTPUT of fdisk /dev/ad0 %%%%%%%%%%%
******* Working on device /dev/ad0 *******
parameters extracted from in-core disklabel are:
cylinders=3648 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=3648 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:
sysid 131,(Linux filesystem)
start 63, size 27342567 (13350 Meg), flag 0
beg: cyl 0/ head 1/ sector 1;
end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
sysid 130,(Linux swap or Solaris x86)
start 27342630, size 257040 (125 Meg), flag 0
beg: cyl 1023/ head 255/ sector 63;
end: cyl 1023/ head 254/ sector 63
The data for partition 3 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 27599670, size 31005450 (15139 Meg), flag 80 (active)
beg: cyl 1023/ head 255/ sector 63;
end: cyl 1023/ head 254/ sector 63
The data for partition 4 is:
<UNUSED>
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