HP Surestore Bridge FC 2/1 LV and FC 4/1 HV Installation and Operations Guide

174 HP-UX Configuration Chapter 7
2. Configure the Tape Device Monitor (dm_stape) of the Event Monitoring
System (EMS) to not run on the host participating in the tape SAN.
The EMS service periodically polls the tape devices to monitor their health.
When this occurs while another server is accessing the tape device,
backup operations may be disrupted, time out and abort.
There are two ways to disable the dm_stape monitor while keeping the
Event Monitoring System enabled.
— Stop the dm_stape process
— Prevent dm_stape from polling
Note To completely disable event monitoring, run /etc/opt/
resmon/lbin/monconfig
and select [(D)isable
Monitoring]
. When event monitoring is shut down in this
fashion, all monitors will be shut down as well.
The monconfig utility is also used to disable individual event
monitors. Note that if individual monitors are disabled, they
continue to run in the background and send SCSI commands to
the devices. The EMS framework ignores the events the monitor
might be generating.
Stopping the dm_stape process
Shutting down the tape device monitor is very difficult. Simply stopping the
process does not work because the EMS framework restarts it.
Note You must follow these instructions in the order given or the
monitor will not be shut down.
1. Disable predictive monitoring requests in
var/stm/config/tools/
monitor/predictive.sapcfg
by commenting out the “dm_stape” tape
drive monitor entries.
2. Delete all monitoring requests for dm_stape:
a. Log in as
[root].
b. Run
/etc/opt/resmon/lbin/monconfig.
c. Run the
[S] command to get a list of all monitors running.