ST506 WTB:Micropolis 1325

[Allison]

>
>Subject: Re: ST506 WTB:Micropolis 1325
>   From: "Andy Piercy" <andy.piercy at gmail.com>
>   Date: Mon, 09 Apr 2007 09:17:47 +0000
>     To: ajp166 at bellatlantic.net
>     Cc: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org>
>
>Allison, All,
>
>I have a similar problem with two ESDI Micropolis 1355 drives both driver
>exhibit the same problem as you describe
>
>Fault
>====
>The drives power up but just seem to fail to load the heads
>i.e. You know that voice coil noise when a working drive loads, well it just
>does not happen on the faulty drives.  The drives spins up but the drive
>access light just stays on. After a while the drives re-tries to load, the
>drive spins down the spins up again but still fails to load the head.
>
>I have two drives with this problem, however both were working but failed
>after a few hours of running (Not including all the years in service ;-),
>and one still intermittently still works.
>
>I had a quote to have the drive repaired but the UK firm wanted 380 UK
>Pounds!
>
>So anyway sorry to ramble, After you opened the drive, did you have any
>problems with dust and head crashes? Do you think that it would be possible
>to fabricate one of these bumpers? Do you have any pictures of this bumper
>within the drive?


That is the typical symptom. spinup no head load then spindown.

I plain removed the bumper. It makes a loud clack now but no ill effects.
The first time I jsut put some Teflon tape over it avoid the sticky
surface but it was harder to do.    No pictures.  I did it in a clean 
work area but not a clean room.  Fequires small tools inside (very small 
area) and I demaged all my tools beforhand.  The only prep I di was to 
clean the unit outside well (dust removeal) then clean the workarea well
with a damp cloth to keep ESD and dust down.

It's been years (at least 8) since I've done this and the drives are still
working.


Allison

>
>
>
>
>
>On 08/04/07, Allison <ajp166 at bellatlantic.net> wrote:
>>
>> >
>> >Subject: Re: ST506 WTB:Micropolis 1325
>> >   From: "Steven N. Hirsch" < shirsch at adelphia.net>
>> >   Date: Sat, 07 Apr 2007 08:42:34 -0400 (EDT)
>> >     To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org
>> >
>> >
>> >On Thu, 5 Apr 2007, Sridhar Ayengar wrote:
>> >
>> >> John Kourafas wrote:
>> >>> Also looking for a Micropolis 1325 MFM Drive, 71/80MB , I've seen both
>> the
>> >>> ST506 and Mic. 1325 on eBay for like 600.00 which I think is crazy...
>> >>
>> >> What's the largest capacity 3.5" MFM HDD available?
>> >
>> >I have an extensive collection of MFM/RLL drives and have _never_ run
>> >across one with that interface in a 3.5" form-factor.  Not sure that
>> >anything of this sort existed.  5.25" 1/2-ht. was about as sophisticated
>> >as they got.
>>
>> I have several miniscribe 20mb in all flavors of interface st412, SCSI
>> and IDE.  I have some really old 3.5" WD 10mb. to name a few.
>>
>> They show up around the beginning of the IDE era but by time IDE hit 40mb
>> they seemed to have disappeared.
>>
>>
>> Allison
>>
>>
>>