Working HD for a IBM PS/2 model 30

Chuck Guzis cclist at
Sat Mar 7 12:47:05 CST 2015

On 03/06/2015 02:02 PM, Tom Gardner wrote:
> Enrico:
> If it isn't broke don't fix it.  U likely have a perfectly good controller
> for any ST412 type MFM HDD controller.  Why would you even consider and IDE
> or SCSI drive when there are many good refurbished MFM drives available at
> capacities well above the 20 MB you are replacing.   Personally I  would
> look for a Maxtor or a Quantum drive staying away from the stepper motor
> types, like the one u are replacing.
> Just Google, "MFM HDD drive for sale"  Select anyone that claims an ST412
> interface from  a reputable vendor, I bet u can even find one in Italy :-)

If memory serves, Tom, the hard drive in a model 20 and 30 is indeed an 
ST412 interface, but it's a 3.5" model.  While not impossible to find, 
they are quite a bit less common than the 5.25" variety--and probably 
close to unobtanium in Italy.


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