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No Fragments Archive 10: Diskmags
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1990
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USERAU90.MSA
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TEXT_DSKBMARK.DOC
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1990-06-24
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DISK DRIVE PERFORMANCE TEST
How fast is your hard disk? OK, so maybe you can quote the manufacturers access
time to the nearest millisecond, but how does this translate to the real world?
And what about those floppy disk formatters that claim to improve the
performance of your disk system, or hard disk cashing programs. Do they work?
Here is a simple utility - called HDBMARK.PRG - written in HiSoft BASIC
that will put your hard or floppy disk drive through a rigorous performance
test. It loads and saves 500k of data, writes 30k of data forwards and
backwards and performs a complex seek test. The timings for each test is
printed on the screen.
To give you a baseline by which you can compare your own system, here are
the figures for a standard format, double sided STE floppy disk:
Time to write 500k block of memory = 78.8 seconds
Time to read 500k block of memory = 27.9 seconds
Time to write 30,000 bytes forwards = 82.4 seconds
Time to read 30,000 bytes forwards = 58.94 seconds
Time to write 30,000 bytes backwards = 155.5 seconds
Time to read 30,000 bytes backwards = 133.6 seconds
Time for seek test = 216.0 seconds
Improvements can be made by switching off the write verify function and
using a "fast formatter" which skews the tracks. There are many PD programs
whioch will do this, so try them and see what difference they make. Hard disk
drives, of course, will be much quicker than any floppy system - try it and
see.
HARDWARE: 1Mb OF RAM, MONO AND MEDIUM RES COLOUR