16 Feb
2013
16 Feb
'13
10:37 a.m.
Someone pointed out that the 3B2's disk may still be salvageable. I'm not sure
about that, but I don't have a lot of
experience with the older drives. It's probably the original disk, as it has AT&T
stickers on it. Plugged into multiple
computers and external drive enclosures it spins up, head load click, then spins down.
I've tried reseating connectors
and checking jumpers, no change. I don't know what the jumper on the bottom side of
the lowest PCB near
the SCSI connector does, and there are two empty DIP sockets on the bottom of the drive
that could possbly be a
part of the problem. I haven't taken a scope to it to trace out the signals yet and
see if an amp died.
16 Feb
16 Feb
11:37 a.m.
On Sat, Feb 16, 2013 at 10:37 AM, Scott Quinn <saquinn624 at aol.com> wrote:
I don't know what the jumper on the bottom side of
the lowest PCB near
the SCSI connector does, and there are two empty DIP sockets on the
bottom of the drive that could possibly be a part of the problem.
(view with fixed width font)
SEAGATE ST4350N/ST4376N JUMPER SETTING
Jumper Setting
==============
Connects CHASIS ground to ground lug ------------+
Connects SIGNAL ground to ground lug ----------+ |
Drive Select ID's -----+ | |
Motor Start Option enable -+ | G G
Parity Check Option enable+ | +-+-+ +1+2+
+P M 4 2 1+|o|o| POWER
|o o o o o||o|o| +---------+
|o o o o o|+-+-+ | O O O O |
------------------------------------+---------+--------+---------PWA-
-+------+---+-------------------------+--------+--------+--Data-PWA--
1------+ |XXXXXXXXXXXXXXXXXXXXXXXXX| +-+ 1--------+
Terminator +------------------------1+ |o| o Terminator
INTERFACE |o+-o
+++
TERMPWR (+5v) from drive (vertical) -----+
TERMPWR from the Bus (lower horizontal)
4329
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4329
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