3.7.0 HP StorageWorks HP Scalable NAS File Serving Software administration guide - HP Scalable NAS 3.7 for Linux (AG513-96002, October 2009)

19 Configure device monitors
HP Scalable NAS provides built-in device monitors that can be used to watch disk
devices or to monitor the status of PSFS filesystems. You can also create custom device
monitors.
Overview
HP Scalable NAS provides the following types of device monitors. To configure a
device monitor, you will need to specify the probe timeout and frequency and a
monitor-specific value.
Other ValuesProbe FrequencyProbe TimeoutType
Filesystem, file-
name
Default: 30 secondsDefault: 5 secondsSHARED_FILESYSTEM
Partition to monit-
or
Default: 30 secondsDefault: 5 secondsDISK
User probe scriptDefault: 60 secondsDefault: 60 secondsCUSTOM
Activity types for device monitors
The activity type specifies where the device monitor can be active. The activity type
can be one of the following:
• Single-Active. The monitor is active on only one of the selected servers. Upon
server failure, the monitor will fail over to an active server unless all associated
service and device monitors are down. (“Associated” service and device monitors
are those monitors that are associated with the same virtual host as this device
monitor.)
• Single-Always-Active. The monitor is active on only one of the selected servers.
Upon server failure, the monitor will fail over to an active server even if all asso-
ciated service and device monitors are down. (“Associated” service and device
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