On 12/19/11 1:01 PM, Ethan Dicks wrote:
I'm now wondering how many other drives used the
same
physical pack types and if they were all embedded servo
The RL0x were one of the few designs that used embedded servo.
I'm pretty sure they patented their design. #4390912 appears
to be the patent.
Pertec, Wango, etc. that had top-loading pack drives used the
same optical positioners that the front-loaders used. Diablo's
40 series used the rotary actuators like the 30 series did, but
they came out well before the DEC RL drives.
I'd have to do some digging to find out what the CDC Hawk used
for cylinder positioning.