Using High Availability Monitors (June 2007)

Monitoring Disk Resources
HA Disk Monitor Reference
Chapter 2 35
Logical Volume Status
Logical volume status gives you status on each logical volume in a
volume group. While the lv_summary gives you information on whether
data in a volume group is available, the lv/status/lvName gives you
information on whether specific logical volumes have failed.
Table 2-4 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 INACTIVE, you would specify greater than or equal to 2
(>=2).
When configuring requests from the HP SMH interface, use a wildcard
(*) in place of lvName to monitor all logical volumes in a volume group.
If you split off mirrors from your mirrored configuration, you will see
new logical volume resource instances when the split mirror is created.
Logical Volume Number of Copies
The logical volume number of copies is most useful to monitor in a
mirrored disk configuration. It tells you how many copies of the data are
available. The HA Disk Monitor monitors all copies of data, and
therefore counts the “original” as part of the total number of copies.
MirrorDisk/UX supports up to 3-way mirroring, so the range can be from
0 to 3 copies (see Table 2-5). In a RAID configuration that is not mirrored
using LVM, the only possible number is 0 or 1; either the data is
accessible or it is not.
Table 2-4 Interpreting Logical Volume Status
Resource Name: /vg/vgName/lv/status/lvName
Condition Value Interpretation
UP 1 All logical volumes are accessible and all data
is accessible.
INACTIVE 2 The logical volume is inactive.
DOWN 3 The logical volume is DOWN. A complete copy
of the data is not available for this logical
volume.