HP NetRAID-4M Installation Guide

2-13
Installing the Hardware
Figure 2-10. Cluster Configuration on a Shared SCSI Channel
Installation Hints for Connecting SCSI Devices
All SCSI Devices
■ The total length of cabling (internal and external) on each
channel should not exceed the following:
– Twelve meters (39.4 feet) if you are using Ultra2 transfer
speeds (80 MBytes/second)
– Twelve meters (39.4 feet) if you are using Ultra3 transfer
speeds (160 MBytes/second)
– Three meters (9.8 ft) if you are using Ultra SCSI data transfer
speeds (20 MBytes/second for 8-bit devices, and 40
MBytes/second for 16-bit devices) and have four or less
devices (including the HP NetRAID-4M).
– One and one-half meters (4.9 feet) if you are using Ultra SCSI
data transfer speeds and have between four and eight devices
(including the HP NetRAID-4M).
Note: Ultra SCSI data transfer speeds can currently
support up to eight devices per channel only.
Cluster Node 1 Array Enclosures Cluster Node 2
Shared SCSI Channel