Date: Sat, 03 Oct 1998 20:24:36 -0500 From: Chris Csanady <ccsanady@friley-185-114.res.iastate.edu> To: freebsd-current@FreeBSD.ORG Subject: Partition weirdness.. Message-ID: <199810040124.UAA04660@friley-185-114.res.iastate.edu>
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I have a couple of partitions that have been behaving somewhat odd. Also,
I have gotten a number of messages recently (from newfs--i think), about
not being able to rewrite the disklabel. Has anyone else been seen this?
On 2 of my bios partitions, I can not write to the second sector. Doing
so will cause the following:
friley-185-114:/# dd if=/dev/zero of=/dev/rda0s4e bs=512 count=1 seek=1
dd: /dev/rda0s4e: Read-only file system
If I seek past 2 sectors, or only write the first sector, I have no
trouble. Does anyone know what might be causing this? My disklabel,
and fdisk output follow..
******* Working on device /dev/rda0 *******
parameters extracted from in-core disklabel are:
cylinders=393 heads=255 sectors/track=63 (16065 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=393 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 165,(FreeBSD/NetBSD/386BSD)
start 63, size 1445787 (705 Meg), flag 80 (active)
beg: cyl 0/ sector 1/ head 1;
end: cyl 89/ sector 63/ head 254
The data for partition 2 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 2104515, size 2104515 (1027 Meg), flag 0
beg: cyl 131/ sector 1/ head 0;
end: cyl 261/ sector 63/ head 254
The data for partition 3 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 4209030, size 2104515 (1027 Meg), flag 0
beg: cyl 262/ sector 1/ head 0;
end: cyl 392/ sector 63/ head 254
The data for partition 4 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 1445850, size 658665 (321 Meg), flag 0
beg: cyl 90/ sector 1/ head 0;
end: cyl 130/ sector 63/ head 254
# /dev/rda0s4c:
type: SCSI
disk: da0s4
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 41
sectors/unit: 658665
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: 658665 0 unused 0 0 # (Cyl. 0 - 40)
e: 65536 0 4.2BSD 1024 8192 16 # (Cyl. 0 - 4*)
f: 593129 65536 4.2BSD 0 0 0 # (Cyl. 4*- 40*)
Thanks,
Chris Csanady
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