Thanks for looking. The references point to
Seagate's later Hawk drives.
The drive I am talking about is a tad bigger! An internal fixed disk, and
a top loading pack on the same spindle. The disk packs are of a similar
size to RK05 packs, albeit top loading rather the front.
I have a vague idea they were also used on early Diablo machines.
Kevin
There were similar drives from Ampex -- Interdata/Perkin-Elmer/Concurrent
had them...
Perhaps this will jar someone's memory.
Bill