24 Jun
2004
24 Jun
'04
9:14 a.m.
At 11:01 24/06/2004 -0700, you wrote:
Hi
Check the termination. Make sure that only one
of the drives has a terminator and that it is
the correct type for that kind of drive. It
is prefered that the terminator is on the last drive
in the string but I've never seen problems when
the drives are side by side.
Dwight
The Morrows use a very odd termination scheme - both
drives have terminatore, and both drive have separate
drive cables, going to two different (and spaced fairly
far apart) connectors on the mainboard.
I've tried all combinations (both in, one or the other in,
both out) - always fails on the TEC drives, always works
with the Panasonic.
I would really like to keep the TEC's in it, as they are
original equipment, and the serial #'s match the assembly
manifest sticker inside the unit.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
24 Jun
24 Jun
10:27 a.m.
On Thu, 24 Jun 2004, Dave Dunfield wrote:
At 11:01 24/06/2004 -0700, you wrote:
It would seem that there are a couple of possibilities for your
problems: - a damaged lower head or read electronics that do not
permit the drive to find a directory or - less likely - incorrect
strapping for drive select and the variables on the drive board.
The rather brief Service Guide that I have for the Morrow MD
series provides no detail at all on the drives. However, they do
caution to replace the A and B drives in the position that they
were removed from such as to not cross up their identity to the
computer. No other manual that I have provides any information on
the TEC FB-503 beyond the fact that it is a half-high 5.25" DS
drive with a 360k capacity.
- don
Hi
Check the termination. Make sure that only one
of the drives has a terminator and that it is
the correct type for that kind of drive. It
is prefered that the terminator is on the last drive
in the string but I've never seen problems when
the drives are side by side.
Dwight
The Morrows use a very odd termination scheme - both
drives have terminatore, and both drive have separate
drive cables, going to two different (and spaced fairly
far apart) connectors on the mainboard.
I've tried all combinations (both in, one or the other in,
both out) - always fails on the TEC drives, always works
with the Panasonic. I would really like to keep the TEC's in it, as
they are
original equipment, and the serial #'s match the assembly
manifest sticker inside the unit.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
7487
days inactive
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dave04a＠dunfield.com -
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