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CLEAN2.DOC
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1983-12-17
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3KB
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******************************************************************** CLEAN2.COM
********************************************************************
A simple program for IBM-PC to make full use of cleaning disks,
such as those sold by 3M and Verbatim.
Format of command:
X>clean [drive:]
If no drive is specified, CLEAN assumes you want to work on the
default drive, else drive a:, b:, etc. When it is through you
are asked if you want to clean any other drives, and if so
prompts for the drive letter.
This works on single or double sided or quad density drives
without modification and naturally will not accomplish too much
on your fixed disk. No harm will come, however, if it is run on
your fixed or floppy disk as it uses the PC-DOS absolute sector
READ to move the head around the disk.
The reason you use a cleaning utility rather than using DIR or
any other command to get the disk moving is that since the disk
in the drive is paper, the head will never get past Track 0 where
DOS goes for the directory in order to try to accomplish your
command. In other words you will never use more than 2.5% of the
surface of your cleaning disk. CLEAN knows there is a cleaning
disk in the drive, ignores the DOS error message that the READ
has failed, and tries to read another sector on another track.
This way the head is moved about the disk and more effectively
cleaned.
Cleaning your disk drive is good preventive medicine, but don't
overdo it. A drive that is in heavy use probably needs to be
cleaned once a week, but on the average once every other month is
plenty.
The reason for the 2 in CLEAN2.COM is that this is the second
version of this program. At the time I wrote CLEAN I only had
single-sided drives and was not able to test CLEAN with
double-sided. Thanks to a User Group Librarian I was set
straight on this and have improved CLEAN. Users of the older
version may remember a patch I had provided for working with DSDD
drives. This patch was not needed. I am sorry for the
inconvenience caused by this and present this better working
version.
CLEAN now times in closer to the recommended 30 seconds for
cleaning a disk. It also uses a random factor to start its
journey across the surface on different tracks. Since it uses
only the most basic of MS-DOS functions, it should run on any
MS-DOS computer.
Program by:
Marty Smith SOURCE ST2259 / COMPUSERVE 12155,1214
310 Cinnamon Oak Lane (713) 661-1241 [Office]
Houston, TX 77079 (713) 464-6737 [Home]
[At my request, Marty has modified the program so that it will
work on any drive letter, so those of us with add-on quad disks
can be next to godliness, too. Don't try sticking a cleaning
disk in your RAM drive, though! R. Jueneman/SYSOP/(703) 237-4322]