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

[Paul Sture]

On 2016-02-14, JF Mezei <jfmezei.spamnot at vaxination.ca> wrote:
> On 2016-02-14 04:48, already5chosen at yahoo.com wrote:
>
>> More I think about it, more the story of VAX hard drive with
>> three-phase AC motor (in early 90s, non-the-less) appears apocryphal.
>
>
> RA82 drive motors were 1/3 horsepower motors. They were not 3 phase, but
> required 3 wires in. There was one used to start the motor in the right
> direction as I recall.  There was some capacitor that would discharge to
> get motor going. I don't recall the exact details.

I know nothing about the wiring details, but two or more RM05 drives could
be connected together so that they spun up in sequence to minimise the
maximum current draw.

And yes, I had a customer who reported that as a hardware error :-(

-- 
There are two hard things in computer science: cache invalidation,
naming, and off-by-one errors.