Ok I made a ugly thing: copied a piece of text from EmulatorArchive!
But I will give you the link too:
http://www.emulatorarchive.com/Archives/Samplers/Emulator_IIIX/E3XSCSI/e3xscsi.htmlTerminators or terminator resistors are special resistor packs that are installed on the first and last device of a SCSI chain. Terminators are installed to reduce line echoes and standing waves on the SCSI bus. The master host system (such as a Mac or EIII) must provide power to these terminators. Only one device should apply termination power, as it is applied through out the SCSI chain via the cables to the device at the other end. Devices in the middle of the chain do not need termination power, nor terminators. Hard disks usually default unterminated and with no termination power, this is fine unless you want the hard drive at one end of the SCSI chain. In which case set termination on the hard drive (but NOT the termination power).
According to the text the SCSI chain should look something like this (example):
Emulator IIIx
terminator power + terminator <--> SCSI+CF-combo (internal)
NO terminator <--> SCSI zip-drive (external)
NO terminator <--> SCSI HDD (external)
terminator only!So what you have to check is that ONLY one of the two end units (EIIIx or the last external drive) have terminator power ON, both the EIIIx and the last SCSI unit must have their terminators active AND NONE of the SCSI units in the middle should have their terminators active, not even the terminator power.
I don't know if this solve your problem but I hope, good luck rectape!
//Escobar
Author