[comp.sys.apple2] Cleaning the 3.5

TSEMM@ALASKA.BITNET ("Ed 'Apple Guru' Moore") (07/24/90)

Any suggestions..how can you get a 3.5 to use a headcleaner...it will normally
scan for maybe 1/2 a second.....not enough time by a long shot...
I'm talking about the cleaning disks and such, BTW...
TSEMM@ALASKA.BITNET
TSEMM@Acad3.fai.alaska.edu

rond@pro-grouch.cts.com (Ron Dippold) (07/25/90)

In-Reply-To: message from TSEMM@ALASKA.BITNET

> Any suggestions..how can you get a 3.5 to use a headcleaner...it will 
> normally scan for maybe 1/2 a second.....not enough time by a long 
shot... 
> I'm talking about the cleaning disks and such, BTW... 
 
Tell Copy II+ to bitcopy the disk, or try to read it using diversi-cache. 
That should leave it on long enough.

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ART100@psuvm.psu.edu (Andy Tefft) (07/27/90)

In article <3368.apple.net2@pro-grouch>, rond@pro-grouch.cts.com (Ron Dippold)
says:
>
>> Any suggestions..how can you get a 3.5 to use a headcleaner...it will
>Tell Copy II+ to bitcopy the disk, or try to read it using diversi-cache.

Any other methods? 3.5 bitcopy doesn't work on a //c and
I don't think diversi-cache does either.


I know there was a simple little program to run slot 6, drive 2
for headcleaning (rwts and dos 3.3, probably). And I actually
wrote a program for dos 3.3 and rwts that would run the disk
and move the head between tracks 0, 17, and 34 and back again
as you pressed a key (I used this for checking out a couple of
old drives, and also for head cleaning). But I don't think that'll
work with a unidisk :-)

throoph@jacobs.CS.ORST.EDU (Henry Throop) (07/28/90)

In article <9007240347.AA23527@apple.com> "Ed 'Apple Guru' Moore"  <TSEMM%ALASKA.BITNET@cunyvm.cuny.edu> writes:
>Any suggestions..how can you get a 3.5 to use a headcleaner...it will normally
>scan for maybe 1/2 a second.....not enough time by a long shot...
>I'm talking about the cleaning disks and such, BTW...

It might be different on your //c, but on the gs, it scans for 1/2 second
or so only if there is no disk in the drive.  If there is a disk that
it is unable to read from (such as a blank disk or a cleaning disk),
it keeps trying for about 5-10 seconds.

Henry

>TSEMM@ALASKA.BITNET
>TSEMM@Acad3.fai.alaska.edu


---
Henry Throop
Internet: throoph@jacobs.cs.orst.edu

tg.exc@pro-harvest.cts.com (Terry Guelfo) (07/28/90)

In-Reply-To: message from TSEMM@ALASKA.BITNET

Sure do.  I can't take the credit for this idea, though.  A friend of mine
told me and I don't know how he came upon it.

Boot up Copy II Plus, put the headcleaning disk in, and choose "Catalog Disk."
That sucker'll run for about 15 seconds trying to read the disk.  You can do
it a second time as I think most headcleaners recommend 30 second cleanings. 
Also works for 5.25" disks, BTW...


        "Journey of many dollar begin with one dollar." -- Decker Moss
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bchurch@oucsace.cs.OHIOU.EDU (Bob Church) (07/29/90)

In article <90207.225502ART100@psuvm.psu.edu>, ART100@psuvm.psu.edu (Andy Tefft) writes:
> In article <3368.apple.net2@pro-grouch>, rond@pro-grouch.cts.com (Ron Dippold)
> says:
> >
> >> Any suggestions..how can you get a 3.5 to use a headcleaner...it will
> >Tell Copy II+ to bitcopy the disk, or try to read it using diversi-cache.
> 
> Any other methods? 3.5 bitcopy doesn't work on a //c and
> I don't think diversi-cache does either.
> 

Ron probably meant diversi-copy, a companion program to diversi-cache which
works with the //c and unidisk. Also, I know that you can copy non-protected
3.5 disks on the //c by using copyII + in "COPY-DISK" mode rather than bit-
copy. I don't have any non-formatted disks just now ( notice how you can format
a blank disk but you can't truly blank a formatted disk) to see if it would
read it like your cleaning disk.


********************************************************************
*                                                                  *
*   bob church  bchurch@oucsace.cs.ohiou.edu                       *
*                                                                  *
*  If economics isn't an "exact" science why do computers crash    *
*  so much more often than the stock market?                       *
*                                          bc                      *
********************************************************************

karlb@pro-angmar.alphalpha.com (Karl Bunker) (07/31/90)

In-Reply-To: message from ART100@psuvm.psu.edu

>  How do I get my 3.5 drive to spin for around 30 seconds so that a 
>  disk drive cleaner gets a chance to work? 
[Or something to that effect.]
 
Easy. From Applesoft:
 
10 ONERR GOTO 20
20 PRINT CHR$(4)"PREFIX ,S5,D1"
 
Hit reset after 30 seconds (or dress up the above program with a 
loop counter).
 

jschober@gnh-starport.cts.com (Joey Schober) (08/01/90)

In Reply To: bchurch@oucsace.cs.OHIOU.EDU (Bob Church)

Can't really "blank" a formatted disk??  Pick up a decent strength magnet or
electromagnet and let it and the disk talk to each other for a little while. 
Might not scramble "every" bit, but sure will do enough damage to make the
computer =think= it's an unformatted disk... :-)
 
     Joseph F. Schober, Sysop, StarPort BBS [703/931-0947 - 3/12/2400 baud]

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