Chapter 2. Installation
Order Number: EK–SMCPC–UG. A01
2–3
2.3.2 Storage Pedestal SCSI Connectors
The pedestal has a SCSI bus in its backplane that supports the SCSI devices that plug
into the slots. The pedestal backplane is preconfigured at the factory with one SCSI bus,
but can be reconfigured to support two SCSI buses if desired. Two SCSI connectors are
located on the personality module which plugs into the top of the backplane. One is used
to connect the pedestal to the host system SCSI adapter; the other is used when support-
ing two buses or extending a SCSI bus from one pedestal to another SCSI device.
2.3.3 SCSI "P" Cable Communications
The SCSI "P" cable is designed for 16-bit, single-ended communications. Sixteen-bit re-
fers to the 16-bit wide data bus. Single-ended refers to a signal whose level is established
between one wire and ground as opposed to a differential signal whose level is estab-
lished by the potential difference between two wires.
2.4
Connecting the Pedestal to the Host System
The pedestal-to-host connection procedure consists of installing the host-to-pedestal
SCSI "P" cable between the SCSI connector on the personality module and the SCSI
connector on the host system, and then powering on and verifying the status of SBB
LED indicators to ensure the equipment is operating properly. The information in this
section is divided as follows:
•
SCSI "P" cable connections
•
Power cable connection
•
Installing devices
•
Pedestal power-on test
NOTE
For fast data transfer, keep SCSI “P” cable lengths as short
as possible.
2.4.1 SCSI "P" Cable Connections
Connecting the pedestal to a host system requires the use of the BN21K cable listed in
Table 2–1. (Specify length when ordering.) The cable can be routed through the rear of
the pedestal behind the bezel, or through one of the four removable filler tabs on each
side of the pedestal at your option. Figure 2–2 is a connection diagram showing the cable
connection between the pedestal and host system. Figures 2–4 and 2–5 show two of the
optional routing paths for the SCSI "P" cable. If a short cable is used, it may be more
convenient to route the SCSI cable from the pedestal to the host directly through one of
the upper rear filler tabs on the left or right side of the pedestal depending on the location
of your workstation. The following procedures apply to a cable long enough to be routed
through the rear, or through one of the filler tabs on each side of the pedestal, at your op-
tion.
