Date: Wed, 11 Mar 1998 14:35:32 -0500 (EST) From: "Alok K. Dhir" <adhir@worldbank.org> To: lamaster@george.arc.nasa.gov Cc: current@FreeBSD.ORG Subject: Re: Amazing :-) Message-ID: <Pine.NEB.3.96.980311143250.27444B-100000@shadow.worldbank.org> In-Reply-To: <B402D6FFC60DBAD9852565C4006ABFAA.0069F3EC852565C4@worldbank.org>
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On Wed, 11 Mar 1998 lamaster@george.arc.nasa.gov wrote:
> Or, here is another idea: somehow your disk geometry (translated
> rather than CHS I assume) is wrong performance-wise: that is,
> perhaps the translation is such that the disk thrashes? I believe
> that may have happened to me once when I had a setup with a small
> DOS partition on my drive and used translation. I now always use
> a dedicated FreeBSD boot disk with CHS addressing and the "true" geometry.
This could be, I suppose.
Thanks...
Here's the fdisk output of my root/usr disk:
******* Working on device /dev/rsd0 *******
parameters extracted from in-core disklabel are:
cylinders=522 heads=255 sectors/track=63 (16065 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=522 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 6,(Primary 'big' DOS (> 32MB))
start 63, size 2056257 (1004 Meg), flag 80
beg: cyl 0/ sector 1/ head 1;
end: cyl 127/ sector 63/ head 254
The data for partition 2 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 2056320, size 6329610 (3090 Meg), flag 0
beg: cyl 128/ sector 1/ head 0;
end: cyl 521/ sector 63/ head 254
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
And here's the disklabel, if it matters:
# /dev/rsd0c:
type: SCSI
disk: sd0s2
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 394
sectors/unit: 6329610
rpm: 7200
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: 409600 0 4.2BSD 0 0 0 # (Cyl. 0 -
25*)
b: 524288 409600 swap # (Cyl. 25*-
58*)
c: 6329610 0 unused 0 0 # (Cyl. 0 -
393)
e: 5395722 933888 4.2BSD 0 0 0 # (Cyl. 58*-
393*)
-------------------------------------------------------------------- \||/_
Alok K. Dhir Phone: +1.202.473.2446 oo \
R7-003, ITSMC Email: adhir@worldbank.org L_
The World Bank Group Washington, DC \/
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