SCSI Cabling

SCSI Cabling

Each Ultra SCSI channel supports up to 15 drives.

The total allowable SCSI bus lengths will be limited to the single-ended bus lengths shown in Table 2-1.

Table 2-1. Supported SCSI Formats and Bus Lengths

 

Bus Speed,

Bus Width,

Bus Length,

Drives** per

SCSI Drive Type*

Max.(MB/Sec)

(Bits)

Max.(Meters)

Channel, Max.

 

 

 

 

 

SCSI-1

5

8

6

7

 

 

 

 

 

Fast SCSI

10

8

3

7

 

 

 

 

 

Fast Wide SCSI

20

16

3

15

 

 

 

 

 

Ultra SCSI

20

8

1.5

7

 

 

 

 

 

Ultra SCSI

20

8

3

3

 

 

 

 

 

Wide Ultra SCSI

40

16

—

15†

 

 

 

 

 

Wide Ultra SCSI

40

16

1.5

7

 

 

 

 

 

Wide Ultra SCSI

40

16

3

3

 

 

 

 

 

*SCSI Trade Association terms.

**The SCSI ID reserved for the RAID controller is not included in this total.

†The maximum number of devices allowed on a Wide Ultra SCSI channel is 8 including the controller, unless bus extender technology is used.

2-4

DAC960PG and DAC960PJ Installation