🚀 go-pugleaf

>>It could turn out that in
>>each of the problematic systems, term power was only being supplied by the
>>device that is later being powered down, and that could explain why the bus
>>doesn't then function.

That would certainly be an unusual case.  Usually, *every* SCSI device
provides termination power, and decent SCSI cables carry it along the
bus.  For the terminator to be without termination power, you'd need a
bad cable, or *every* SCSI device powered off, including the CPU
(except for some laptops).

One way of monitoring this is to get an active terminator.  It's a good
idea anyway for modern Macs with decently fast SCSI controllers, and most
of them have an LED that tells you that the terminator is receiving power.

>If it is that way, the easiest solution is to get SCSI Sentry II from APS.
>It is not only an excelent active terminator, it also provides termination
>power through a seperat power supply, so it does not matter wich drive is
>does or does not provide termination power.

That should work fine, but is overkill for most situations.  The SCSI Sentry
(original version) is half the price, provides active termination and a
termination power LED.  And if it turns out that the terminator really isn't
receiving power, it has a jack to which you can connect an external power
adapter.  Or, you might want to figure out why termination power is not
being supplied by any of the devices.

	Dave