Asus NR-LSR SCSI Connection Notes, 5.Ultra160 SCSI connector (SCSIB)

5.Ultra160 SCSI connector (SCSIB)

This motherboard has two 68-Pin Ultra160 SCSI connectors, one internal and one external (see section “1.4 Motherboard overview” for details on the external SCSI connector). The SCSI connectors can support a maximum of 15 devices as specified by Ultra160 standards.

HDSCSI	SCSI-B
68-Pin Ultra160/	68-Pin Ultra160/
Ultra2-Wide SCSI Connector	Ultra2-Wide SCSI Connector

1 35

68 34

NR-LSR

NR-LSR Onboard SCSI Connectors

34 68

35 1

SCSI Connection Notes

The onboard SCSI chipset incorporates an advanced multimode I/O cell that supports both single-ended (SE), Ultra2, and Ultra160 devices. With Ultra160 devices, the SCSI bus platform performs at full Ultra160 speeds (up to 160MB/s) and extended cabling 12m (or 25m in a point-to-point configuration). When an SE device is attached, the bus defaults to an SE speed and 1.5m cable length.

Connect SCSI devices as shown. Each channel should have only one type of SCSI standard (e.g. Ultra160, Ultra2, Ultra-Wide). Mixing SCSI devices on the same channel decreases performance of the slower device.

68-pin Internal SCSI Cable (Twisted-Pair Ribbon)

				Channel B
					68-pin Female
	Internal SCSI Devices (up to 15 devices)				Terminator
		68-pin Internal SCSI Cable (Twisted-Pair Ribbon)
						Channel A
							68-pin Female
NR-LSR
			Internal SCSI Devices (up to 15 devices)				Terminator

NR-LSR SCSI Connection Example

2-18 Chapter 2: Hardware information