HP Integrity NonStop H-Series - Manual (Page 91)

Guardian
Subsystems
5–6 098571 Tandem Computers Incorporated
Guardian The DSNM keyword, GUARDIAN, refers to a number of entities in the operating
system, which are treated as though they were objects in a single subsystem.
If you use DSNM to monitor these operating system objects, you will find the
following information helpful. While it covers what you need to know about entities
in the operating system from the viewpoint of operating DSNM, it is not exhaustive.
For more details, refer to the Guardian User’s Guide.
Object Types DSNM views certain entities in the operating system as if they were objects in a
subsystem referred to by the DSNM keyword, GUARDIAN. The subsystem includes
the following object types: CPU, DISK, VOLUME, and PATH. The PATH object type
must be explicitly stated. The hierarchical relationships among disks, volumes, and
paths are shown in Figure 5-3. CPUs are on the same hierarchical level as disks, but
have no hierarchical relationship with the other object types.
Figure 5-3. Subsystem Object Hierarchy for GUARDIAN
PATH PATH
VOLUME
003
VOLUME
DISK CPU
States Table 5-5 shows how DSNM reports state information from the operating system.
Table 5-5. How DSNM Reports GUARDIAN States
DSNM Object State GUARDIAN Subsystem State
UP UP
DOWN DOWN
Effects of the Hierarchy
Modifier
Table 5-6 shows the effects of the hierarchy modifier when it is applied to the various
object types in this subsystem. The default value is ALL.