headclnr.txt		1/29/82
contributed by Roy Lipscomb, Logic Associates

The following three items document Shugart's changing
policy towards head-cleaning diskettes.  (Spelling
and punctuation are faithful to the cited sources.)

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(Reprinted from Personal Systems, newsletter of the San Diego
Computer Society, July 81, p. 17)

SHUGART DOES NOT RECOMMEND CLEANING DISKS

The following is reprinted from a Shugart Service Memo (#2,
dated January 27, 1981) and was submitted by Hugh Turner.

"There have been numerous inquiries from our customers
concerning Shugart's stand on cleaning diskettes.  Our Media
Engineering group has finished it's testing on several
cleaning diskettes and determined that they do not meet our
engineering specifications, for the following reasons:

*  The cleaning diskettes are too abrasive and are not as
flexible as the media.  This causes the diskette to deteri-
orate the head between 5-10uin horizontally and between
2-15uin vertically.

*  The cleaning diskettes do not comply with the side 0 button.
Due to the flexibility of the cleaning diskettes, side 0 was
only cleaned where the side 1 rails hit side 0.  The side 1
head was not cleaned on the taper surface of the head.

*  These results were seen after ten minutes which simulated
twenty cleanings of 30 seconds each.

BASED ON THE ABOVE TEST RESULT IT IS SHUGART'S RECOMMENDATION
AT THIS TIME NOT TO APPROVE OR RECOMMEND ANY CLEANING DISKETTE.

If customers continue to use a cleaning diskette they may run
the risk of voiding their warranty.  Test results show that
the cleaning diskettes will blend the side 0 head causing media
wear under normal usage.  The corrective action for this
problem is to replace the complete head assembly at the
customer's expense.

Our Engineering group is conducting on going evaluations with
several vendors to correct the above discrepancies in order
to approve some type of cleaning diskette in the future.

Please direct any further questions to Technical Support, 475
Oakmead Parkway, Sunnyvale CA 94086; (408)733-0100."

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(Reprinted from Personal Systems, newsletter of the San Diego
Computer Society, August 81, p. 8)

Shugart Service Memo

Product:  All Floppy Products 
   Date:  March 20, 1981
 Memo #:  4

Subject:  Cleaning Diskettes for Floppy Dirves

     Shugart Associates has approved Innovative Computer
Products cleaning diskette (P/N 2024 only) for use on
Floppy Disk Drives.
     Use of the cleaning diskette kit will not void the
warranty as long as the manufacturers instructions that
are supplied with the kit are followed.
     Shugart plans to private label cleaning diskettes
in the near future.
     This memo supercedes Memo #2, Cleaning Diskettes
for Floppy Products.


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(Ad in Mini-Micro Systems, January 1982, p. 254)

SHUGART OFFERS HEAD-CLEANING KIT

This floppy-disk-drive head-cleaning kit in 5 1/4 and
8-in. sizes contains two lint-free, non-abrasive polyester
diskettes in vinyl jackets, a 4-oz. bottle of cleaning 
solvent and a dispenser cap.  The kit, which provides
13 cleanings per diskette, cleans single- or double-sided
drives with a wet/dry application.  The kits sell for
$28 for the 8-in. size and $26 for the 5 1/4-in. size,
in OEM quantities.  SHUGART ASSOCIATES, 475 Oakmead
Parkway, Sunnyvale, Calif. 94086.


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