HP StorageWorks Clustered File System 3.2.1 Windows Storage Server Edition Administration Guide (February 2006)

Chapter 12: Configure Device Monitors 123
• A server is considered down if it loses coordinated communication
with the cluster (for example, the server crashed or was shut down,
HP Clustered File System was shut down on the server, the server
failed to schedule a cluster group communication process for an
extended period of time).
3. If the device monitor is multi-active, it will be active on all servers
passing evaluation for steps 1 and 2. If the device monitor is single-
active, then the list of servers is filtered by the following policy items
to determine the one server where the device monitor will be active.
4. From the list of servers that pass evaluation for steps 1 and 2,
ClusterPulse tries to find a server with all services up and enabled on
the virtual hosts associated with this device monitor. If Clusterpulse
finds a server meeting these conditions, it will use it, preferring
servers earlier in the list of servers for this device monitor.
5. If there are no servers with completely healthy services, ClusterPulse
picks a server that has at least one service up and enabled. If
ClusterPulse finds a server meeting these conditions, it will use it,
preferring services earlier in the list of servers for this device monitor.
6. If ClusterPulse cannot locate a server meeting these conditions, it will
make the device monitor active on the first server in the list of servers
for this device monitor.
Add or Modify a Device Monitor
Select the appropriate option from the HP CFS Management Console:
• To add a new device monitor, select the server to be associated with
the monitor from the Servers window, right-click, and select Add
Device Monitor (or click the Device icon on the toolbar). Then
configure the device monitor on the New Device Monitor window.
• To update an existing device monitor, select the monitor on the
Servers window, right-click, and select Properties. Then make your
changes on the Device Monitor Properties window.