28 Jul
1999
28 Jul
'99
2:08 a.m.
On Wed, 28 Jul 1999, Geoff Roberts wrote:
I have an identical vaxconsole/Pro380 that came with my
Vax 8530.
It had a dud hard drive and I (eventually) managed to sub a common or garden
Seagate(?) (I think - will check) MFM drive. IIRC, I had to LLF it in a PC
before POS would format it.
Aside from that, it was no big problem.
I did try 2 or 3 "status unknown" MFM drives before I found one that would
work.
The RD31 was a Seagate ST225, and the RD32 was an ST251...The ST251 did
something like 40ms avg. access, and the ST251-1 was 28ms...The best upgrade I
ever did in one of my pdp11/73s running RSTS/E was replace the ST251 with an
ST251-1. :-)
Anyway do the MFM controllers in PROs have the same hard-coded drive model
restrictions as their Qbus big brothers, like the RQDXn family?
Also, on the subject of RT11...Does anyone know if Mentec has any sort of
"hobbyist" class license for the PDP11 OSs, or if not, does anyone know what
their actual prices are like?
-Dave McGuire