Using High Availability Monitors (June 2007)

Monitoring Disk Resources
HA Disk Monitor Reference
Chapter 232
The pv_pvlink status is used to calculate pv_summary. Although it is
somewhat redundant to use both, you might want to have more specific
status sent by pv_summary, and only have status sent on pv_pvlinks if a
device is DOWN.
pv_pvlinks and pv_summary supplement lv_summary by giving status
on the accessibility of volume groups (both active and inactive) and
logical volumes.
To pinpoint a failure of a particular disk, bus, or I/O card, you need to use
the HA Disk Monitor alerts in conjunction with standard troubleshooting
methods: reading log files and inspecting the actual devices. The HA
Disk Monitor uses the data in /etc/lvmtab to see what is available for
monitoring, and /etc/lvmtab does not distinguish between physical
volumes and physical volume links, so you need to investigate to detect
whether a disk, bus, or I/O card has failed.
Table 2-2 lists how conditions compare in logical operations. You 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 BUSY, you would specify greater than or equal to 2 (>=2).
While configuring requests from the HP SMH interface, a wildcard (*)
can be used in place of deviceName to monitor all physical volumes and
physical volume links in a volume group.
Table 2-2 Interpreting Physical Volume and Physical Volume Link Status
Resource Name: /vg/vgName/pv_pvlink/status/deviceName
Condition Value Interpretation
UP 1 SCSI inquiry was successful.
BUSY 2 SCSI inquiry returned with DEVICE BUSY.
The HA Disk Monitor will try 3 times to see if
it gets either an UP or DOWN result before
marking a device BUSY.
DOWN 3 SCSI inquiry failed. The bus and/or the disk
is not accessible.