Hitachi Dynamic Link Manager Software Users Guide for AIX (7.6)

value will take effect after the next automatic failback successfully
completes. When intermittent error monitoring is not being
performed, the number of errors that determine that an intermittent
error has occurred is not counted and this value is not changed.
The number of times that the error is to occur is stored in the system,
even when -iem off is specified and intermittent error monitoring is
disabled. Therefore, when you re-enable intermittent error monitoring
without specifying the number of times, the error monitoring will be
executed using the value stored in the system.
When the set -iem on operation is executed during error monitoring,
even though you do not change the conditions for intermittent error
monitoring, the number of errors and the time that has passed since the
error monitoring has started are reset to 0. Intermittent error monitoring
will then resume with the changed settings.
If you set the automatic failback function to off while intermittent error
monitoring is on, intermittent error monitoring will be disabled. Note,
however, that if you use the view -sys operation to display the HDLM
functionality configuration, Intermittent Error Monitor will be shown as
on. When the automatic failback function is returned to on, intermittent
error monitoring will once again be enabled.
The executable operations for the automatic failback function and
intermittent error monitoring depend on the settings for those functions.
The table below shows the relationship between the settings and available
operations for automatic failback and intermittent error monitoring.
Table 6-5 Relationship Between the Setting for the Automatic Failback
Function and Intermittent Error Monitoring and the Executable Operations
Setting
Available operation Result of operation
AFB IEM
on on
Set AFB to on. The operations of AFB and IEM do not
change.
Change the AFB setting. AFB is performed under the new
settings.
#1
Set AFB to off. • AFB and IEM are disabled.
• The error count, elapsed monitoring
time, and information about paths
not subject to automatic failback
are cleared.
Set IEM to on. • When a path is being monitored
(during a period of conditional
intermittent error monitoring), the
value of the error count and the
elapsed monitoring time are reset to
0, and then intermittent error
monitoring will restart.
• When a path is not being
monitored, nothing changes.
6-26
Command Reference
Hitachi Dynamic Link Manager User Guide for AIX
®