[cctalk] Re: Connecting MFM emulator as both 1st and 2nd drive in Microvax 2000?

[Paul Koning via cctalk]

> On Aug 13, 2023, at 5:55 PM, Chuck Guzis via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> On 8/13/23 12:48, Mike Stein via cctalk wrote:
>> Yup; I think I've got a couple of each type somewhere; don't recall who the
>> other ones were, but two are definitely Canon.
> 
> Just a late imitation of the CDC 808 hard disk drive--the difference
> being that the 808 could handle several tracks at once without moving
> the heads.  Big 6+ ft. boxes, 4 spindles. 2 5 hp spindle motors, 2
> hydraulic positioners (808--807 was half that).  When disk drives were
> *big*.   Nihil sub sole novum.   I think I have a single 808 head in my
> desk drawer, somewhere.
> 
> https://ia800809.us.archive.org/30/items/TNM_Control_Data_807-808_Disk_Files_-_Control_Dat_20170826_0047/TNM_Control_Data_807-808_Disk_Files_-_Control_Dat_20170826_0047.pdf

That drive was the fastest transferring disk, by a large margin, for quite a 
while.

Didn't Cray use multiple bits in parallel disk drives in the Cray-1?
        
        paul