American Megatrends MAN-758 manual SCSI Termination Possibilities, Connect SCSI I/O, Continued

Step 11 Connect SCSI I/O, Continued

SCSI Termination Possibilities

S C S I terminator

S C S I

t e r m i n a t o r

		Termination on					S C S I d e v i c e s
	Termination on controller					(termination disabled on both)
		motherboard
			enabled
		enabled.
			Setup using one connector for one channel
										S C S I
										terminator
				TerTerminationinatio			on controlleron		S C S I d e v i c e s
	S C S I d e v i c e s				motherboardi s a l e d			(termination disabled on both)
(termination disabled on both)					disabled.

Setup using two connectors for one channel

If the MegaRUM is at one end of a cable, it sets termination automatically at that end. Otherwise, MegaRUM disables its own termination and you must set termination at the cable ends. If another connector on MegaRUM is also used for the same channel, the termination on MegaRUM is disabled automatically and termination should be set on the device at the farthest end of the cable.

For a disk array, set SCSI bus termination so that removing or adding a SCSI device does not disturb termination. An easy way to do this is to connect MegaRUM at one end of the SCSI cable for each channel and to connect an external terminator module at the other end of each cable. The connectors between the two ends can connect SCSI devices. Disable termination on the SCSI devices. See the manual for each SCSI device to disable termination.

Selecting a SCSI Terminator Use ALT-2 type external SCSI terminators on SCSI channels operating at 10 MBs or higher synchronous data transfer.

Cont’d

40MegaRUM PCI Motherboard User’s Guide