HP A4800A manual Connecting Scsi Peripheral Devices

Installing the A4800A Adapter

Connecting SCSI Peripheral Devices

Connecting SCSI Peripheral Devices

Connect multiple SCSI devices by chaining them together with shielded, 68-pin, High-Density (HD) cables. The connectors on these cables are keyed to ensure proper pin-1 to pin-1 registration. Refer to the peripheral manual for instructions on attaching SCSI cables. Peripheral storage devices are normally shipped with the required SCSI cables.

Table 2-3 below shows the SCSI bus widths and speeds that have been established by the SCSI Trade Association (STA).

Table 2-3	SCSI Bus Widths and Speeds
			SCSI Bus Speed
	Type(1)	SCSI Bus	Maximum Data
		Width (in Bits)	Rate (in
			MBytes/Second)
	SCSI-1	8	5
	Fast SCSI	8	10
	Fast Wide SCSI	16	20
	Ultra SCSI	8	20
	Wide Ultra SCSI	16	40
	Ultra2 SCSI	8	40
	Wide Ultra2	16	80
	SCSI
	(1)Absence of the word “Wide” means an 8-bit bus width;
	using the term “Narrow” to avoid ambiguity is acceptable,
	too.

You can connect up to eight SCSI, Fast SCSI, and Ultra SCSI devices on a single-ended Ultra SCSI bus if they are evenly spaced on a 1.5 m Ultra 2 SCSI cable (0.19 m between devices).

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