Date: Wed, 15 Jan 1997 07:39:24 -0800 (PST) From: Ping Mai <ping@stepnet.com> To: dwhite@resnet.uoregon.edu Cc: freebsd-hackers@freebsd.org Subject: Re: FAQ Section 2.15... Message-ID: <199701151539.HAA05100@tibet.stepnet.com> In-Reply-To: <Pine.BSI.3.94.970114163114.9790C-100000@localhost> from Doug White at "Jan 14, 97 04:31:44 pm"
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Thanks Doug! Just what I need.
A related question.
I have a disk with 4 slices. bsd is placed
on the 4th slice. I maded it with
"disklabel -w -r -B sd0s4 auto". I tried booteasy and
os-bs. Neither can boot sd0s4. os-bs keeps complaining
that ther's no operating system to boot from. I even
tried copying the boot blocks from /usr/mdec/boot{1,2}.
Didn't make a diff. The only way I can get into bsd
is copying the kernel to a dos disk and doing a
"fbsdboot -rD kernel". What to do? Please help?
fdisk and disklabel:
[114]ping@blue:~> fdisk sd0
******* Working on device /dev/rsd0 *******
parameters extracted from in-core disklabel are:
cylinders=2069 heads=64 sectors/track=32 (2048 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=2069 heads=64 sectors/track=32 (2048 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 32, size 524256 (255 Meg), flag 80
beg: cyl 0/ sector 1/ head 1;
end: cyl 255/ sector 32/ head 63
The data for partition 1 is:
sysid 5,(Extended DOS)
start 524288, size 524288 (256 Meg), flag 0
beg: cyl 256/ sector 1/ head 0;
end: cyl 511/ sector 32/ head 63
The data for partition 2 is:
sysid 7,(OS/2 HPFS, QNX or Advanced UNIX)
start 1048576, size 1048576 (512 Meg), flag 0
beg: cyl 512/ sector 1/ head 0;
end: cyl 1023/ sector 32/ head 63
The data for partition 3 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 2097152, size 2140160 (1045 Meg), flag 0
beg: cyl 1023/ sector 63/ head 255;
end: cyl 1023/ sector 32/ head 63
[115]ping@blue:~> disklabel sd0s4
# /dev/rsd0s4c:
type: SCSI
disk: sd0s4
label:
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 1045
sectors/unit: 2140160
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]
a: 65536 0 4.2BSD 0 0 0 # (Cyl. 0 - 31)
b: 122880 65536 swap # (Cyl. 32 - 91)
c: 2140160 0 unused 0 0 # (Cyl. 0 - 1044)
e: 61440 188416 4.2BSD 0 0 0 # (Cyl. 92 - 121)
f: 1890304 249856 4.2BSD 0 0 0 # (Cyl. 122 - 1044)
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