3.5" floppy failure mode? Hub not attched to media.

Mike Stein mhs.stein at gmail.com
Sat Feb 28 13:17:41 CST 2015

----- Original Message ----- 
From: "Chuck Guzis" <cclist at sydex.com>
To: <General at classiccmp.org>; 
"Discussion at classiccmp.org:On-Topic and Off-Topic 
Posts" <cctalk at classiccmp.org>
Sent: Saturday, February 28, 2015 1:43 PM
Subject: Re: 3.5" floppy failure mode? Hub not 
attched to media.

> On 02/28/2015 10:14 AM, Mike Stein wrote:
>> Are you saying that it actually stepped in and 
>> out
>> during a rotation to follow the eccentricity?
> I'm saying that it's very unlikely that it did. 
> The OEM manual makes no reference to such 
> behavior.  So, getting on-track was likely a 
> matter of reading an embedded servo mark or two, 
> tweaking the "fine" stepper and signaling 
> end-of-seek.
> --Chuck

----- Reply ----

No, I agree with you, Chuck; it seemed to be what 
Eric was suggesting though.

BTW, I just tried gluing a cookie back to the hub 
with superglue; no problem.

Couldn't read it of course, presumably because 
it's not aligned to the index; also, maybe mine is 
a different make from yours but the hub isn't 
conical and there is a tiny bit of radial play.

So in that respect I have to agree with Eric that 
reading data off a cookie that's been reattached 
to the hub is a pretty iffy proposition, but if 
anyone does succeed I'm sure we'd all love to read 
about it.


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