Disk ][ Speed Testing - need troubleshooting advice

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Last seen: 5 years 3 months ago
Joined: Feb 1 2009 - 14:44
Disk ][ Speed Testing - need troubleshooting advice

I'm running Copy II plus v8.2 on two Disk ][ drives using an Apple IIe (I copied it over to the apple IIe disk using ADT). I suspect I have bad 5.25 disks that I mail ordered recently. However, I'm checking the drive speed to be sure. Drive 1 is successful in initializing the new disks 90 percent of the time. Disk 2 is almost never successful. Disk 2 sounds crunchier than disk 1 when it reads and writes and tries to init a disk. Disk 2 has been opened and checked for head dirt, it is clean.

Should the speed test be on a newly initialized disk or on any disk that has been used and is write-able? If the Copy II plus Drive Speed test is on write-able disks that have already been written to then the results are...

Disk 1:
Speed: 199.8 MS consistent.

Disk 2:
Speed: 199.3 MS consistent.

The only weird part of the test was when I used brand newly formatted disks. When I put in the brand newly formatted disks and ran the test the disk 2 drive speed fluctuated wildly between 199 and 67. The drive 1 fluctiations were between 199 and 007. I think I saw that right. Once the test got going, the drive speed evened out to 199 for each drive. I'm using the same disk in each drive for each test.


Last seen: 5 years 3 months ago
Joined: Feb 1 2009 - 14:44
My question is...

What I'm curious about is if it is the drive or the disks that cause the read and init probems ( less problems in drive 1 than drive 2)? Drive 2 seems to have a few read problems, but I think the new disks are worse. -thanks

A2forever's picture
Last seen: 1 year 6 days ago
Joined: Dec 20 2003 - 10:38

Has anyone had any sucess using Copy ][ Plus setting drive speeds to 200 ms? I have never tried this , but I know that on the rear of the Disk ][ 's there is a pot that you can adjust while using Copy ][ Plus , and put in a blank diskette and adjust the Drive's speed? Also , I have had a alot of luck with reading and write problems , due mainly because of the drive's head being dirty. I used Alcholhol and a cue tip , and it cleaned it up nicely. I know I should use 100% if I could find that , and medical swobs , but you know how it goes.....

See ya.


Last seen: 3 days 12 hours ago
Joined: Jun 5 2008 - 07:26
If the numbers returned are a

If the numbers returned are anywhere with 5 or 10 milliseconds of 200, speed of your drive is shouldn't be causing any issues. I would guess that any results between 185 and 215 MS per revolution would work perfectly well. In fact, I did some tests with APTEST and found that I could still read disks when the speed was adjusted practically off of the scale shown on the screen.

As for the inconsistent results with new disks, I would suspect a head dragging or sticking to surface of the floppy.

Last seen: 1 month 1 week ago
Joined: Dec 19 2003 - 18:53
Head cleaning

-Blow out the years of collected dust, hair, crumbs, etc. with compressed air

-Use only anhydrous (without water) alcohol (available at electronic or chemical supply stores).

-Use a Q-tip wrapped in a nylon stocking to apply the alcohol/ rub off any residue.


gsmcten's picture
Last seen: 3 weeks 3 days ago
Joined: Oct 4 2005 - 18:52
Blank Disks...
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