On 3/9/21 5:49 PM, Chris Zach via cctalk wrote: > Interesting document Al. Reading about the RK05, it seems to be little more than a double density version of the RK8/RK03(?) Was that a > Diablo drive or a Pertec? RK03 was a Diablo. The big difference was the linear voice coil motor in the RK05, similar to the PERTEC D3000 and it being DEC's first in-house moving head disk design.