[Info-vax] OT: the Daily WTF for today is a VAX/VMS story

[terry-groups at glaver.org]

On Sunday, February 14, 2016 at 8:31:49 AM UTC-5, Scott Dorsey wrote:
> I don't know of any DEC drives that use a motor attached directly to the
> AC line.  That's not to say that they don't exist, but I have never used
> one.  IBM had some.

The DEC RP07 (which I believe was a re-badged Memorex something-or-other IBM 338x clone) did. From ER-ORP07-SV: "The disk stack rotation system of the RP07 drive, consists of the following: 1. A double-ended three phase drive motor with an attached electromagnetic brake on the bottom end and a pulley on the top. ..." It also used 3 phase power for the blower motor. However, it had a phase sequence detector board which would light an "Unsafe" lamp on the front panel if the phases were out of sequence.