Using EMS HA Monitors

Chapter 2 35
Monitoring Disk Resources
Disk Monitor Reference
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, in the case of a new bus technology. The /etc/syslog
entry would say:
diskmond[5699]: pv_summary will be unavailable for /dev/vg00 because there
are physical volumes in this volume group which are on an unrecognized bus.
(DRM-502)
• PVGs (physical volume groups) exist in a volume group, but not all physical
volumes are assigned to a PVG. The /etc/syslog entry would say:
diskmond[18323]: pv_summary will be unavailable for /dev/vgtest because the
physical volume groups (PVGs) in this volume group do not have an equal
number of PVs or there are PVs not in a PVG. (DRM-503)
• Unequal numbers of physical volumes exist in each PVG in the volume group.
The /etc/syslog entry would say:
diskmond[18323]: pv_summary will be unavailable for /dev/vgtest because the
physical volume groups (PVGs) in this volume group do not have an equal
number of PVs or there are PVs not in a PVG. (DRM-503)
Two cases where this would occur are:.
• There are both 2-way and 3-way mirroring in the same volume group.
• Mirrored disks are a different number of physical disks with the same total
disk mi4Gb drive in one PVG and 2 2G drives in the redundant PVG.
All checks for the validity of pv_summary are logged to both /etc/syslog and
/etc/opt/resmon/log/api.log with the name of the local node and the
identifier diskmond.