Installation guide

Preinstallation Planning
Manual No. 775007 2-7
*
SCSI Trade Association (STA) Terms
† The maximum number of devices allowed on a Wide Ultra SCSI bus is 8 unless
bus extender technology is used
Table 2-1. Supported SCSI Formats and Bus Lengths
SCSI Drive Type*
Bus
Speed,
MB/Sec,
Max.
Bus
Width,
Bits
Max. Bus Length, Meters* Max. Device
Support
(Including
Controller)
Single-ended Low-Voltage
Differential
SCSI-1 5 8 6 - 8
Fast SCSI 10 8 3 - 8
Fast Wide SCSI 20 16 3 - 16
Ultra SCSI 20 8 1.5 - 8
Ultra SCSI 20 8 3 - 4
Wide Ultra SCSI 40 16 - - 16 †
Wide Ultra SCSI 40 16 1.5 - 8
Wide Ultra SCSI 40 16 3 - 4
Ultra2 SCSI 40 8 Not Defined 12 8
Wide Ultra2 SCSI 80 16 Not Defined 12 16