Using High Availability Monitors (June 2007)

Monitoring Disk Resources
HA Disk Monitor Reference
Chapter 230
Table 2-1 lists how conditions compare in logical operations. Specify the
logical operation in the monitor request parameters portion of the
monitor request. For example, to create a request that alerts you when
the condition is SUSPECT or DOWN, specify greater than or equal to 3 (>=3).
The pv_summary resource may not be available for a given volume group
in the following cases:
• Devices are on an unsupported bus (such as HP-IB or HP-FL) or an
unrecognized bus, (such as a new bus technology). The
/var/adm/syslog/syslog.log entry would say:
Table 2-1 Interpreting Physical Volume Summary
Resource Name: /vg/vgName/pv_summary
Condition Value Interpretation
UP 1 All physical volumes containing data are
accessible.
PVG_UP 2 At least 1 PV has failed. All data is accessible.
If more than 1 PV is down and the failed PVs
are from the same PVG, all data is still
accessible.
This condition can only occur in mirrored set
or in PV links in PVGs.
SUSPECT 3 Two or more physical volumes from different
PVGs are not available. The disk monitor
cannot conclude that all data is available.
For example, on a 2-way mirrored system, if a
physical volume fails on each side of the
mirror, data may be available if the failed
volumes are holding different data. But data
may be unavailable if the failed volumes hold
the same data. Because the disk monitor only
knows that disks have failed, and not what
data is on the disks, it marks the volume
group SUSPECT.
DOWN 4 Some data missing or no data accessible.