Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

are used. The system default restore policy is check_disabled. The system default
interval is 300 seconds.
Warning: Decreasing the interval below the system default can adversely affect
system performance.
Stopping the DMP path restoration thread
Use the following command to stop the DMP path restoration thread:
# vxdmpadm stop restore
Warning: Automatic path failback stops if the path restoration thread is stopped.
Displaying the status of the DMP path restoration thread
Use the following command to display the status of the automatic path restoration
kernel thread, its polling interval, and the policy that it uses to check the condition
of paths:
# vxdmpadm stat restored
This produces output such as the following:
The number of daemons running : 1
The interval of daemon: 300
The policy of daemon: check_disabled
Displaying information about the DMP error-handling thread
To display information about the kernel thread that handles DMP errors, use the
following command:
# vxdmpadm stat errord
One daemon should be shown as running.
Configuring array policy modules
An array policy module (APM) is a dynamically loadable kernel module (plug-in
for DMP) for use in conjunction with an array. An APM defines array-specific
procedures and commands to:
■ Select an I/O path when multiple paths to a disk within the array are available.
191Administering Dynamic Multipathing
Administering DMP using vxdmpadm