ICL PERQ 2 T2 Micropolis 1303 spinning down.

Rob Jarratt robert.jarratt at ntlworld.com
Sat Jan 2 08:28:28 CST 2021

My only solution has been to open up the HDD itself and attempt to clean up the goo. Or, in some cases put a sliver of paper between the rubber bumper and the head assembly to stop it sticking. I don’t have a clean room and I know this is not advised, but it has worked for me.






From: Mattis Lind <mattislind at gmail.com> 
Sent: 02 January 2021 13:05
To: rob at jarratt.me.uk
Cc: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Subject: Re: ICL PERQ 2 T2 Micropolis 1303 spinning down.




Den lör 2 jan. 2021 kl 11:48 skrev Rob Jarratt <robert.jarratt at ntlworld.com <mailto:robert.jarratt at ntlworld.com> >:

When that has happened to MFM disks of mine it has been because for one reason or another the heads have not moved and found track 0. Why they aren't moving could be more than one reason. They could be stuck, or there could be some other problem that is preventing them getting the power needed to move.


Did you solve the problem? How?


I have heard that Micropolis 1325 is prone to have a problem with a rubber bumper that sticks to the head mechanism. Maybe it is the same for this Micropois drive? What resolutions are there to this type of problem?






> -----Original Message-----
> From: cctalk <cctalk-bounces at classiccmp.org <mailto:cctalk-bounces at classiccmp.org> > On Behalf Of Mattis Lind via
> cctalk
> Sent: 02 January 2021 08:59
> To: General Discussion: On-Topic and Off-Topic Posts
> <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org> >
> Subject: ICL PERQ 2 T2 Micropolis 1303 spinning down.
> I have a nice ICL PERQ 2 T2 that I am going to start working with now.
> First thing was to try to image the hard drive. It is a Micropolis 1303. It spins
> up but when it reaches what I think the correct speed it immediately spins
> down. Usually I think there would be a click and then the heads would
> recalibrate. But there is no click and no head movement.
> I really would like to make an image of the drive.  What are your thoughts?
> Are the heads sticking?
> Some kind of solenoid that is not releasing the heads? Not properly up to
> speed? (but it sounds like the speed is right)
> /Mattis

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