Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!nrl-cmf!ukma!rutgers!att!mtuxo!mtgzz!drutx!druwy!dlm
From: dlm@druwy.ATT.COM (Dan Moore)
Newsgroups: comp.sys.atari.st
Subject: Re: SF314 Drive Speed
Message-ID: <3815@druwy.ATT.COM>
Date: 13 Feb 89 16:35:53 GMT
References: <8902102314.AA09414@ucbvax.Berkeley.EDU>
Organization: AT&T, Denver, CO
Lines: 27

in article <8902102314.AA09414@ucbvax.Berkeley.EDU>, JDONAHOE@UA1VM.BITNET (JAMES DONAHOE) says:
> Please help me. I've got a Spectre 128 and a Translator One. I have been
> unable to format a Mac disk with my drives. I called Data Pacific and
> they said if my drives are more than 1% fast the format will not work.
> My drives checked out at 304.5 rpm. My question is:can you adjust the
> speed on a (green lighted)TDK drive? I've looked at the board on the drive
> drive itself and found one adjustable pot. Is this the speed control?

	If your drive is running between about 295 and 308-310 RPM you
should be able to format a disk in Mac mode.  Can the Translator read
and write to the disk? If it can't write to a Mac disk then the problem
is probably not the speed.  Some drives just will not work with the
Translator due to high or low pass filters that prevent the Mac data
from getting to/from the disk. 

	Some 3.5" drives have a drive speed adjustment, most do not.  I
don't know if TDK drives have one or not.  It can't hurt to try the
changing the pot, if it doesn't change the speed just make sure you
change it back to the way it was.



				Dan Moore
				AT&T Bell Labs
				Denver
				dlm@druhi.ATT.COM
				dlm@druwy.ATT.COM