IntraServer Technology ITI-90-100250 - Manual (Page 35)

Page 35 of 83
Cabling External Devices
Be certain to use high quality differential cable for all your external LVD/SE
connections. When running in LVD mode (LVD LED indicator ON), your
total LVD bus must be kept to 12 meters for multi-drop connections. If the
bus is being used in SE mode (LVD LED indicator OFF), the bus must be
kept to 1.5 meters. You must provide LVD termination at the end of the
external bus.
Figure 10: External Ultra2/LVD Devices
SUNCluster™ Cabling Examples
The SCSI cable shall not exceed 1.5M total length if the bus is running in
Single Ended Mode, or 6M Ultra2/LVD Mode and needs correct termination
at each end of the cable. There is a short internal cable inside the box, which
connects the IntraServer rear transition card internal connector to the Cable
adapter at the rear end of the HDD (see the cabling diagrams below).
There is ONE external cable per SCSI channel, which connects the two
System boxes. SCSI terminators are required at each end of the cable. This is
achieved by enabling the auto terminators on the SCA adapters. The same
arrangement may be repeated for the second SCSI chain.
Ultra2 SCSI
LVD/SE Terminator
(External)
Ultra2 SCSI LVD/SE
External Connector
Ultra2 SCSI
Differential Cable
Ultra2 SCSI LVD
External Devices