Array Controllers; Figure 1-5 Hsg80 Array Controller And Cache Modules - Compaq RA8000 User Manual

RA8000 and ESA12000 Storage Subsystems

1.2.1 Array Controllers

Either an HSG80 Fibre Channel array controller or an HSZ80 UltraSCSI array controller
can be used. The array controller presents the storage devices to the host system as
another device connected to one of its I/O buses. The array controller then processes the
I/O requests to the storage devices of the subsystem. The array controller(s) mount in the
lower front of the cabinet (see Figure 1-5 for HSG80 and Figure 1-6 for the HSZ80).
Installing two array controllers with cache modules provides complete array controller
redundancy as described in either the HSG80 Array Controller ACS Version 8.3
Maintenance and Service Guide or HSZ80 Array Controller ACS Version 8.3
Maintenance and Service Guide.
Array controllers and cache modules removed from array
controller card cage for clarity in Figures 1-5 and 1-6.
Modules are not a single unit.
Figure 1–5 HSG80 Array controller and Cache Modules
Controller
Shelf or
Enclosure
1–8
NOTE
Controller
Card Cage
Array Controller
Modules
387404-001
Cache
Modules
SHR-1146
EK–SMCPR–UG. A01