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[arnljot]

I have this CD ROM:
Manual for Plextor PX-40TSi

According to this, this CD ROM Drive has active termination if enabled with jumpers. Termination is documented on page 27 of the pdf.

There is also a seagate drive. Manual here

This drive is 50 pin and was placed after the CDROM. It provides termination. Without it the Amiga will just enter a cycle of indefinate reboots. With it, it will complain that one of the partitions have an write error because the device has an illegal state.

Page 37 of the PDF holds an overview of the configuration of the drive. I dont get the idea with the two TERMINATION POWER vs. the TERMINATION ENABLE.

Like the drive is now, it has a jumper on one TP and not enabled TE. That's wrong according to the manual...

From the manual:
TE (Applies only to "N" models)
On With the jumper installed, the On-board (non-removable) terminator circuits are enabled
(connected to the I/O lines). Default is jumper installed.
Off Terminator circuits not connected to I/O lines.

Now, this jumper is not enabled on the drive. And when everything boots up, but the drive complaints about an "illegal state" this jumper is not enabled.

From the manual:
TP TP
Off Off No terminator power is connected to drive terminators or SCSI bus I/O pin 26.
On Off Drive supplies its own terminator power only. Jumper on this position is factory default.
Off On Drive supplies power to I/O pin 26 of SCSI bus; none to internal terminators. When drives have
differential I/O circuits, a jumper on the right TP position may be needed to power external
terminators (see system documentation). The "ND" drive has differential I/O circuits which
have no terminator circuits on the drive.
On On Drive supplies terminator power to itself (internal connection) and to I/O pin 26 of SCSI bus.
This is a legal jumper setting.

The drive is currently configured as "On Off" for Term power.

Both of these drives are after a uwscsi-2-fastscsi internal convertor.

On the other side of the cs scsi there is a uwscsi drive.

I could not find any online pdf manual for the Quantum Viking 4.5GB drive (68 pin uwscsi). But all jumpers are disabled. Also TE.