the connectors on this cable are keyed to ensure proper pin-1 connection.

All external SCSI bus connections to the LSIU40HVD are made with shielded, 68-conductor cables (see Figure 2.3). The connectors on this cable are always keyed to ensure proper pin-1 connection.

Table 2.1 lists the SCSI bus widths and speeds as established by the SCSI Trade Association (STA).

Table 2.1SCSI Bus Widths and Speeds

 

 

 

 

 

 

 

SCSI Bus Speed

 

 

SCSI Bus

Maximum Data Rate,

STA Terms

Width, Bits

Mbytes/s

 

 

 

 

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 SCSI

16

80

 

 

 

1. Absence of the word Wide means an 8-bit bus width. It is

acceptable to use the word Narrow to avoid ambiguity.

 

 

 

 

Important: Use only cables designed and specified for operation with Ultra SCSI devices to make connections to the LSIU40HVD.

Detailed Installation Procedure

2-7