Chapter 1: Introduction
Rear Panel Components
1-9
1.5.1.3 Host IO Board
The host IO board is mounted on the IFT-3260 controller board by the way of
two board-to-board connectors and secured to the controller with six
retention screws. Four retention screws are inserted into spacers which are
connected to the controller board. The other two retention screws are inserted
directly into the controller module chassis. The host IO board is secured to
the controller rear panel with two retention screws on the serial port and four
retention screws on the expansion SCSI connectors.
The host IO board is connected to the mid-plane with a single connector.
VHDCI connectors allow for host-side connection (CH0 and CH1).
Two host IO board variations are available (see
Table 1-1
). The host IO
board that comes with the four channel models (IFT-9270UDU4S4) does not
have a chip or any of the external expansion connectors. The host IO board
that comes with the 6 channel models (IFT-9270UDU4S6) comes with an
additional chip onboard and with two additional SCSI-320 drives that are
preset as drive channels and connected to external expansion connectors.
1.5.1.4 Interfaces
The interfaces that enable the subsystem to connect to external devices are
located on the IO board and accessed through the controller module rear
panel shown in
Figure 1-8
.
Figure 1-8: Controller Module Rear Panel
♦
Host
– The SCSI-320 68-pin host channel VHDCI connectors are not
found on the controller module. The host channels are all found at the
top of the rear panel of the subsystem (see
Figure 1-5
). These channels
are used to connect the ES subsystem to the host through two VHDCI
SCSI connectors.
♦
Expansion
– The six channel models come with two SCSI-320 68-pin
expansion channel VHDCI connectors marked CH4 and CH5 in
Figure
1-8
.
