Sun Microsystems LSI22320-SR manual Bus Length, Table A-1Bus Restrictions

Bus Length

The maximum SCSI bus length is determined by the SCSI bus type (that is, the number of devices connected).

Table A-1 shows the maximum SCSI bus lengths for Ultra320 SCSI with a 8/16-bit bus width.

TABLE A-1Bus Restrictions

SCSI Type	Peak	Single-Ended			LVD
	MBytes
	/sec	Max Length*	No. of Devices	Max Length*	No. of Devices
SCSI-2
Narrow	10	3	8	25	2
				12	8
Wide	20	3	16	25	2
				12	16
SCSI-3 Ultra1
Narrow	20	1.5	8	25	2
		3	4	12	8
Wide	40	1.5	8	25	2
		3	4	12	16
SCSI-3 Ultra2		N/S\
Narrow	40		N/S	25	2
				12	8
Wide	80	N/S	N/S	25	2
				12	16
SCSI-3 Ultra3
Narrow	80	N/S	N/S	25	2
				12	8
Wide	160	N/S	N/S	25	2
				12	16
SCSI-3 Ultra320
Narrow	160	N/S	N/S	25	2
				12	8
Wide	320	N/S	N/S	25	2
				12	16

*This maximum length (shown in meters) must include the internal bus length of your system. Sun qualifies cable lengths of only up to 10 meters (22.8 feet).

\ N/S = not supported

14 Sun StorEdge PCI/PCI-X Dual Ultra320 SCSI Host Adapter Installation Guide • January 2007