Ah yes, I remember SLEUTH very well. On the HPIB systems we had a
different program called SLEUTHSM (SLEUTH SiMulator) which was very
similar.

As for the 792x discs, the 7920 was 50MB and the 7925 was 120MB. Only
the early drives had the window.

As I recall, the 793x discs had a butterfly seek test built into the
firmware and so it could be executed from the front panel.

As I recall, the butterfly test could also be executed from the DSM
(Disc Service Module), a test box which we hung from the side of the
disc and plugged into the controller card. Head alignments and seek
times were adjusted using this box.

Ahhhhhhh, those were the days. Things were lots, lots simpler.

--
        --Pete Crosby  ([log in to unmask]  a.k.a. [log in to unmask])

>
>Tracy Johnson wrote:
>>
>> One thing that was cool about the HP7925 (about 25MB I think), what
>> that it had a window on top.  We had one just sitting around
>> disconnected but still in the row with the HP7933's.  We removed the
>> disk pack and had arranged some old clothes into a neat circle around
>> the edge...
>
>And for bonus points, who remembers SLEUTH (on the standalone diagnostic
>tapes) where you could load up a "butterfly seek" test going from the
>innermost cylinder, outermost cylinder, IC+1, OC-1, IC+2, OC-2, etc?
>You could watch the action with the 7925 :-)  SLEUTH was a wicked tool,
>sort of a BASIC programming language for disc drive sadists :-)
>
>Jeff Kell <[log in to unmask]>