HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 209)

If this condition is not satisfied, an error will occur and the warning message
KAPL01080-W will be output.
If this happens, change any of the following settings: the checking interval
for automatic failbacks, the intermittent error-monitoring interval, or the
number of times that the error needs to occur.
If you set the number of times that the error needs to occur to 1, the above
condition does not need to be satisfied.
The following is an example of setting up automatic failback by using a
command:
# /opt/DynamicLinkManager/bin/dlnkmgr set -afb on -intvl 10
To enable the automatic failback function, set it to on. When on is specified,
you can use the -intvl parameter to specify the checking interval. If the
checking interval is not specified, the value that was previously specified will
be applied. For example, specify the auto failback as off after specifying the
checking interval to five minutes and executing. Then, when executing after
specifying the auto failback as on without specifying the checking interval, the
five minutes that were specified previously will be applied again.
Setting Up Intermittent Error Monitoring
You can set the intermittent error monitoring only when automatic failback is
enabled. To prevent an intermittent error from reducing I/O performance, we
recommend that you monitor intermittent errors when automatic failback is
enabled.
When intermittent error monitoring is enabled, you can specify intermittent
error conditions. The default value for the intermittent error-monitoring
interval is 30. The default value for the number of error occurrences is 3.
The system assumes that an intermittent error has occurred if the specified
number of times that the error needs to occur is reached during the specified
monitoring interval (minutes). A path that is assumed to have an intermittent
error is excluded from performing an automatic failback. Intermittent error
monitoring starts right when the path is recovered from the error by
performing an automatic failback. Monitoring is performed on each, individual
path.
When a value of 2 or more is specified in the number of error occurrence,
make sure that the condition shown in Setting Up the Automatic Failback
Function on page 3-142 is satisfied. To determine whether an intermittent
error is occurring in a path, you can use the execution results of the dlnkmgr
command's view operation.
The following shows an example of executing the command to set
intermittent error monitoring.
# /opt/DynamicLinkManager/bin/dlnkmgr set -iem on -intvl 20 -iemnum 2
Creating an HDLM Environment
3-143
Hitachi Dynamic Link Manager (for Solaris) User Guide