Path: utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!uccba!psmsd!pmartin
From: pmartin@psmsd.UUCP (Paul Martin)
Newsgroups: comp.unix.xenix
Subject: Re: Perstor Disk Drive Controllers
Summary: The info perstor gave me...
Keywords: disk drive controllers,experiences requested,how?
Message-ID: <27@psmsd.UUCP>
Date: 19 Mar 90 13:56:29 GMT
References: <868@edstip.EDS.COM> <24@psmsd.UUCP> <614@sixhub.UUCP>
Distribution: na
Organization: P.S.M. Software Development
Lines: 28

In article <614@sixhub.UUCP>, davidsen@sixhub.UUCP (Wm E. Davidsen Jr) writes:
> In article <24@psmsd.UUCP> pmartin@psmsd.UUCP (Paul Martin) writes:
> |                                                      The only caution I
> | have is make sure that your case for the drive has good ventilation.
> | The perstor will cause your drive to get hotter than normal thus causing
> | a failure.  This is because the drive spins faster under the perstor.
> 
>   Trust me, that's not how it works. Any form of RLL does not "make the
> drive spin faster" not does it "put the bits closer together." It gets
> compression by putting the bits farther apart and measuring the distance
> between them more closely.
> 

The info I got from perstor is that they DO make the drive spin faster,
this info could be incorrect but I thought the controller had some 
control over drive speed

When the drive has getting hot, it would not format under an MFM
controller until it cooled down, now logic tells me that the drive was
getting hotter than it's normal operating parameters.  Now I ask myself
how would the drive get hotter under the perstor?  Also the drive would
operate fine under an MFM even after it warmed up.  I could be wrong
about this but this is the info I got from tech support.
-- 
+--------[ Paul Martin at P.S.M. Software Development ]--------+
| Smart: pmartin@psmsd.UUCP     | "Yes I am serious, and don't |
| Dumb:  ...uccba!psmsd!pmartin |  call me Shirley!"           |
+-------------------------------+------------------------------+