User`s guide

Installing Optional Disk and Tape Drives
7-7
DEC00919
A
B
C
Figure 7-1. Five Connector SCSI Cable
• A jumper cable is supplied to connect the two storage backplane
segments together to make a single SCSI channel.
• Two internal terminators are supplied for the storage backplane;
one to terminate Channel A and the other to terminate Channel B.
• Two additional wide cable with two wide SCSI 68-pin unshielded
connectors are supplied to connect Channel A or Channel B to a
separate controller or channel.
Storage Backplane
Your storage backplane supports seven hot-swap devices split between
two SCSI bus sections: SCSI Channel A and SCSI Channel B (see Figure
7-2). SCSI Channel A is the upper bus section and consists of four SCSI
device connections. SCSI Channel B is the lower bus section and consists
of three SCSI device connections. These channels can be configured as
two independent SCSI buses or as one SCSI bus by installing a wide
SCSI jumper cable.