Nick Demos wrote:
>
> The 7905 (or 6?) was a 5 mgb drive
> the 7908 a 10 mgb drive

Not sure about those, we had 79xx drives in our 2000/Access system
which had a fixed and a removable platter that I thought were 20Mb
drives.

> the 7920 a 50 mgb drive
> the 7925 a 100 mgb drive.

Agree on the 7920, but the 7925 was a 120Mb drive.

> There was also a 48 MGB non-HP drive sold by HP.  It
> also had a number but we always referred to the as the
> "ISS" (the manufacturer) drives.

I think it was the 2883.  It was based on updated IBM 2314 technology,
essentially a double-density IBM 2314 (which itself was a double density
IBM 2311 with an electromagnetic seek actuator piston as opposed to the
2311's hydraulic [seriously!] piston).  They did maintain the "washing
machine" form factor of the 2311 as opposed to
the stackable, modular 2314s.  We had one on our 2000, 3 on our 3000,
and I worked with 4 of them under the "Telex" label in an IBM 360
environment.

The 3000 versions were perhaps the most peculiar.  They did not run
on a standard I/O channel, they had a byte multiplexor interface.
Weird beasties!

Jeff Kell <[log in to unmask]>