cwgeom(1)

NAME
cwgeom - inform Clockwise of disk scheduling parameters.

SYNOPSIS
cwgeom [-c clockwise] [-g geometry] [-v]

DESCRIPTION
The utility cwgeom reads a geometry file and downloads this file into Clockwise. For each disk that is to be scheduled by Clockwise, Clockwise must be told the geometry, the seek performance table and the read and write performance table. If this information is not present in Clockwise, Clockwise cannot schedule disks.

  OPTIONS

-c  Specify clockwise entry point.

-g  Specify geometry file.

-v  Set verbose output.

FILES
The standard geometry file is the following.
#
# Seagate Cheetah
#
disk ST19101W
rpm 10033
nheads 16
ncyls 6582 st19101w.s
nzones 7
zone 0 0 195 1344 st19101w.r0 st19101w.w0
zone 1 4170208 187 1104 st19101w.r1 st19101w.w1
zone 2 7454424 176 1092 st19101w.r2 st19101w.w2
zone 3 10510750 166 864 st19101w.r3 st19101w.w3
zone 4 12790702 155 816 st19101w.r4 st19101w.w4
zone 5 14800374 145 732 st19101w.r5 st19101w.w5
zone 6 16486048 131 624 st19101w.r6 st19101w.w6
The Seagate Cheetah disk is a disk that rotates at 10,033 RPM, has 16 heads, and 6582 cylinders. The seek performance table can be found in the file st19101w.s and for each of the 7 zones, the files st19101w.r[0-6] and st19101w.w[0-6] specify the how long it takes to read or write a block from disk. Also, for each zone the start sector number, the number of sectors per track and the number of tracks are given.

BUGS
None that I know off.

SEE ALSO
cwd(1)