3 Nov
1997
3 Nov
'97
8:31 a.m.
I'm not sure about the actual jumper settings, but if you have web access,
I would check out http://www.computercraft.com for more info. They have
everything from benchmarks to how to upgrade a 486.
Ciao,
Tim D. Hotze
----------
From: Daniel A. Seagraves <dseagrav(a)bsdserver.tek-star.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Subject: Hard drive jumper settings required.
Date: Monday, November 03, 1997 4:44 PM
I'm going to attach this to the QD21, so I need to reset the jumpers.
IBM 115MB ESDI drive, type 0669, sequence # 104040108
There are 6 DIP switched behind the drive terminator. I'm told I have to
use a straight-through cable, so I went and got one.
The drive does nothing. With a crossover cable (Where the pins are
crossed, a normal PC cable) it went click-clunk, click-clunk, and did
nothing. The drive is known good. (I pulled it from a PS/2 which we
upgraded to a SCSI drive)
If anyone works at Advanced Technology Services, the drive came from Cat
origionally and has the ATS sticker "ATS-444862"
Another barcode on top of the drive by the air inlet says "B1AF3092241"
8 Nov
8 Nov
10:49 a.m.
At 05:31 PM 97/11/03 +0300, you wrote:
I'm going to attach this to the QD21, so I need to
reset the jumpers.
IBM 115MB ESDI drive, type 0669, sequence # 104040108
There are 6 DIP switched behind the drive terminator. I'm told I have to
use a straight-through cable, so I went and got one.
Yep, you need one. You can use a standard PC cable and ignore the twisted
connector, or simply cut and resolder the twisted portion. This works for me.
The drive does nothing. With a crossover cable (Where
the pins are
crossed, a normal PC cable) it went click-clunk, click-clunk, and did
nothing. The drive is known good. (I pulled it from a PS/2 which we
upgraded to a SCSI drive)
Here's the plan. Get the drive specs from the IBM web site (this will be
tough, their sites are, in my experience, very hard to navigate), and grab
a copy of the QD21 manual that explains each of the required parameters.
There are copies available online, I can email it to you if necessary.
Boot your machine to the chevron prompt, then start up the QD21 firmware.
Hopefully you'll have the "newer" menu driven version, if not then
you'll
have to set up some tables in memory as described in the manual.
The QD21 has a "read disk parameters from device" setting, I'd try that
first to see if it works for your drive. I've have mixed success with
non-DEC drives on this one. If it works then you're away to the races, just
format from the QD21 menus and then INIT DUxx from VMS or whatever's on
your VAX.
If not then you'll have to enter a bunch of parameters from the drive
specs, plus some that you can calculate from the specs as stated in the
manual.
The drive select jumper on the drive must generally be set to "drive select
2". If you're getting no response this may be the problem. The cable must
not be of the twisted variety. Make sure your cable polarity is right, etc.
etc.
I have had success with IBM ESDI drives and the QD21, just keep fiddling
and you'll get it going!
I hope this helps,
Kevin
---
Kevin McQuiggin VE7ZD
mcquiggi(a)sfu.ca
10:52 a.m.
On Sat, 8 Nov 1997, Kevin McQuiggin wrote:
Yep, you need one. You can use a standard PC cable and
ignore the twisted
connector, or simply cut and resolder the twisted portion. This works for me.
I already have a straight-through.
Here's the plan. Get the drive specs from the IBM web site (this will be
tough, their sites are, in my experience, very hard to navigate), and grab
a copy of the QD21 manual that explains each of the required parameters.
There are copies available online, I can email it to you if necessary.
Email would be good, I've tried looking for the manual but had no luck
finding it.
Boot your machine to the chevron prompt, then start up
the QD21 firmware.
Hopefully you'll have the "newer" menu driven version, if not then
you'll
have to set up some tables in memory as described in the manual.
I do have the menus. I can get that far.
The QD21 has a "read disk parameters from
device" setting, I'd try that
first to see if it works for your drive. I've have mixed success with
non-DEC drives on this one. If it works then you're away to the races, just
format from the QD21 menus and then INIT DUxx from VMS or whatever's on
your VAX.
VAX? The QD21 is in a PDP-11/23+.
If not then you'll have to enter a bunch of parameters from the drive
specs, plus some that you can calculate from the specs as stated in the
manual.
OK
The drive select jumper on the drive must generally be
set to "drive select
2". If you're getting no response this may be the problem. The cable must
not be of the twisted variety. Make sure your cable polarity is right, etc.
etc.
I have had success with IBM ESDI drives and the QD21, just keep fiddling
and you'll get it going!
That's the usual plan...
I hope this helps,
If you really have the manual, it will!
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