Specifications

1–10 General Description
Controller Components
The HSG80 Array Controller components that you will use most often, such as the
maintenance port and the OCP, are conveniently located on the controller’s front
panel. The host port and program-card slot are also located on the front panel, making
it easy to update the controller’s software or to connect the controller to a different
host.
Each controller is supported by its own cache module. Figure 1–3 shows which cache
module supports which controller in a dual-redundant configuration in a BA370 rack-
mountable enclosure.
Figure 1–3. Location of Controllers and Cache Modules
IMPORTANT: Compaq recommends that you use the slots for controller A and
cache module A for single configurations. Slot A responds to SCSI target ID
number 7 on device buses; slot B responds to SCSI target ID number 6 on the
device buses.
Controller A
Controller B
Cache module A Cache module B
EMU
PVA
CXO6283A