4 Jan
2014
4 Jan
'14
11:50 a.m.
On Sat, 4 Jan 2014, Garrett Meiers wrote:
Does anyone have any information about these HP hard
drives?
https://www.dropbox.com/sc/xovh6yyel6zhzil/B4UelO3lhK
Model 97500-85620.
They have a 40 pin connector on them, but no power input. Doing a search
shoes a mix of companies describing these as either HPIB or IDE. I
believe HPIB is probably the case, but I can't find any documentation for
the drives to be 100% sure. I would love to find a manual/spec sheet for
the drives.
They are 20 MB MFM drives with a proprietary interface. I have at least a
dozen of them, coming from old HP Vectra PCs. I also have a HP 4972A
network analyzer that has one built in. The Vectras used a special
controller (8 bit ISA) with a 6809 and a BIOS. I also have those cards;
they work well in other ISA bus PCs (successfully used them in Pentium
class machines). IIRC the transfer rate is inferior (4 Mbit/s?) to the
usual ST-412 MFM rate (5 Mbit/s). But I really like the sound of the
actuator, similar to a ST-225.
Christian