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

monitors are those monitors that are associated with the same virtual host as this
device monitor.)
• Multi-Active. The monitor is active simultaneously on all servers configured for the
monitor.
By default, DISK and SHARED_FILESYSTEM monitors are multi-active. This
configuration allows the device monitor to probe a shared resource such as a SAN
partition containing a PSFS filesystem.
CUSTOM monitors can be either single-active or multi-active, depending on the
service or device being monitored.
SHARED_FILESYSTEM device monitor
If you have created a virtual host for applications that obtain their data from a PSFS
filesystem, or if you just want to monitor access to a PSFS filesystem, you can use the
SHARED_FILESYSTEM device monitor to ensure that the filesystem is healthy and the
virtual host remains available.
A SHARED_FILESYSTEM device monitor is associated with a specific PSFS filesystem.
The monitor probes the filesystem at periodic intervals to determine the filesystem
health. The probe attempts to open and read a file located on the filesystem. When
you configure the monitor, you can specify the file to be read, or you can let HP
Scalable NAS create a file for this purpose.
A SHARED_FILESYSTEM device monitor attempts to be active on each server specified
in its configuration. The device monitor probe reports an UP status for the filesystem
only if it is mounted and file content can be read from the filesystem.
When you create a SHARED_FILESYSTEM device monitor, be sure to configure the
following advanced options:
• Virtual hosts. Select any virtual hosts that should fail over if the monitor probe
reports a DOWN status for the filesystem.
• Servers. Select all servers that have mounted the filesystem and are running the
applications associated with the virtual hosts.
You might also want to create Start, Stop, or Recovery scripts to customize the
behavior of the monitor.
Disk device monitor
The DISK device monitor can be used to monitor a disk device. It periodically attempts
to read the first block of the specified disk partition to determine whether the disk is
operating normally.
Configure device monitors330