31 Dec
2012
31 Dec
'12
2:32 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Jerome H. Fine
Sent: 31 December 2012 00:16
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Getting an ST-225 disk to work
25-H
Whenever I have used any RD5n or RD3n drive with the
RQDX3 controller on the PDP-11, the drive always had be be DS3.
I don't know if the MSCP controller is built into the MicroVAX 2000, but I
suspect that DS3 is so standard with DEC that all MSCP RD3n drives must be
DS3 in a DEC system.
Jerome Fine
[Rob Jarratt]
Thanks for the tip. I tried what I think is DS3 but it seems to make no
difference, whatever I do this is what I get:
emanuel stiebler wrote:
On
2012-12-30 14:18, Rob Jarratt wrote:
> I have a Seagate ST-225 that I want to put into my Micro PDP-11/73.
> At the
> moment I am just trying to see if the disk works at all and if I can
> format it in a MicroVAX 2000. It spins up but the TEST 70 and TEST 71
> commands fail on it, unable to determine the type of disk. There are
> some jumpers for which I have found some documentation here:
> http://stason.org/TULARC/pc/hard-drives-hdd/seagate/ST225-21MB-5- H-MFM-S
T412.html, but I am not sure which is pin 1, and I am not sure what
settings the MicroVAX 2000 wants, or if it needs the resistor
termination pack.
Can anyone tell me which jumper settings I need for the disk to work
in a 2000? And whether I need the resistor pack installed?
AFAIRC, it should have the resistors in, as it is at the end of the
cable. And it should be recognized by the TEST70, or it was used on a
different system. Is it labeled as a rd31? Probably you have to do a
real low level format, entering all the right parameters in the TEST70
yourself . >> test 71
KA410-A RDver
VSmsv_QUE_unitno (0-1) ? 0
VSmsv_STS_Siz .????
VSmsv_RES_ERR #2
84 FAIL
>>
The error is immediate, I hear no head movement, no lights flash on the
drive, it just spins. It is as if it was not recognising its presence at
all. I suppose it could be the drive electronics, but I have no easy way of
knowing that.
Regards
Rob