Installation guide

Physical Hardware Configuration
5-4 Fault Tolerant System Administration (R1004H) HP-UX version 11.00.03
Figure 5-2 shows the hardware path for the console controller bus.
Figure 5-2. Console Controller Hardware Path
The top level address for a category of logical or physical devices is referred to as
a nexus. The figures in this chapter use the nexus names that appear in the
description field of ftsmaint ls or ioscan output to identify the appropriate
bus or subsystem path. For example, GBUS is the GBUS Nexus, which represents
the main system bus. Table 5-1 lists the nexus-level categories that might appear in
ftsmaint ls or ioscan output. The table is divided into two sections. The nexus
names in the top section (Physical Device Addresses) represent classes of physical
addresses; the nexus names in the bottom section (Logical Device Addresses)
represent classes of logical addresses. The description lists the corresponding
nexus, that is, where a logical address connects to a physical address (or vice
versa). Refer to Table 5-1 when examining the figures in this chapter.
Table 5-1. Hardware Categories
Term Description
Physical Device Addresses
GBUS Nexus Refers to the main system bus.
PMERC Nexus Refers to a CPU/memory board and its resources.
(LMERC is the corresponding logical nexus.)
RECCBUS Nexus Refers to the console controllers. (LMERC is the
corresponding logical nexus.)
Level 1
Bus/Logical
Level 2
Subsystems
Main System Bus
GBUS
RECC adpt
01
RECCBUS
logical devices ...
0
1
11~15
1/0
1/1
RECC adpt