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Installing the A4800A Adapter
Connecting SCSI Peripheral Devices
Chapter 226
You can connect up to four devices if they are evenly spaced on a 3 m
Ultra SCSI cable (0.75 m between devices). The single-ended SCSI bus
must not exceed 3 m (total internal and external cable lengths) even with
fewer than four devices.
Table 2-4 below shows the maximum bus length for each of the SCSI
types.
Table 2-4 Maximum SCSI Bus Lengths
Type
Maximum Bus Length (in Meters)
(1)
Maximum
Devices
Single-ende
d (SE)
Low
Voltage
Differentia
l (LVD)
High
Voltage
Differentia
l (HVD)
SCSI-1 6 12.5 25 8
Fast SCSI 3 12.5 25 8
Fast Wide
SCSI
3 12.5 25 16
Ultra SCSI 1.5 12.5 25 8
Ultra SCSI 3 - - 4
Wide Ultra
SCSI
- 12.5 25 16
Wide Ultra
SCSI
1.5 - - 8
Wide Ultra
SCSI
3--4
Ultra2 SCSI
(2)
12.5
(2)
8
WideUltra2
SCSI
(2)
12.5
(2)
16