Managing Serviceguard Eighteenth Edition, September 2010

service will terminate after six such consecutive read attempts (a duration of up to six
poll intervals).
volume_path
The full path to at least one VxVM volume or LVM logical volume device file for
monitoring (required). The pathname must identify a block device file.
Examples
/usr/sbin/cmvolmond -O /log/monlog.log -D 3
/dev/vx/dsk/cvm_dg0/lvol2
This command monitors a single VxVM volume, /dev/vx/dsk/cvm_dg0/lvol2,
at log level 3, with a polling interval of 60 seconds, and prints all log messages to
/log/monlog.log.
/usr/sbin/cmvolmond /dev/vg01/lvol1 /dev/vg01/lvol2
This command monitors two LVM logical volumes at the default log level of 0, with a
polling interval of 60 seconds, and prints all log messages to the console.
/usr/sbin/cmvolmond -t 10 /dev/vg00/lvol1
This command monitors the LVM root logical volume at log level 0, with a polling
interval of 10 seconds, and prints all log messages to the console (package log).
Scope of Monitoring
The Volume Monitor detects the following failures:
• Failure of the last link to a storage device or set of devices critical to volume
operation
• Failure of a storage device or set of devices critical to volume operation
• An unexpected detachment, disablement, or deactivation of a volume
The Volume Monitor does not detect the following failures:
• Failure of a redundant link to a storage device or set of devices where a working
link remains
• Failure of a mirror or mirrored plex within a volume (assuming at least one mirror
or plex is functional)
• Corruption of data on a monitored volume.
Planning for NFS-mounted File Systems
As of Serviceguard A.11.20, you can use NFS-mounted (imported) file systems as shared
storage in packages.
The same package can mount more than one NFS-imported file system, and can use
both cluster-local shared storage and NFS imports.
174 Planning and Documenting an HA Cluster