HP Hitachi Dynamic Link Manager Software - Manual (Page 110)

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When the intermittent error monitoring interval or the number of
times that the error is to occur has not been specified before:
The intermittent error monitoring interval is set to 30 minutes, and
the number of times that the error is to occur is set to 3.
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When the intermittent error monitoring interval or the number of
times that the error is to occur has been specified before:
The values specified from the last time are used.
The following shows the sub-parameters that should be specified: the
error monitoring interval and the number of times that the error is to
occur:
-intvl error-monitoring-interval
Specify the monitoring interval for an intermittent error. Use a value
from 1 to 1440 minutes. The default is 30.
During intermittent error monitoring, if changes are made to the
intermittent error monitoring interval setting, the number of errors
counted on all paths until the changes are made, and the state of
exclusion from automatic failback are initialized. Monitoring then
restarts using the new settings.
The error monitoring interval specified in this parameter is stored
even if specifying -iem off disables intermittent error monitoring.
Therefore, when you re-enable intermittent error monitoring and an
error monitoring interval is not specified, intermittent error monitoring
will be started using the stored error monitoring interval.
-iemnum number-of-times-error-is-to-occur
Specify the number of times the error needs to occur for an
intermittent error to be assumed. Valid values are from 1 to 99. The
default is 3.
During intermittent error monitoring, if changes are made to the
setting for the number of times that an error is to occur, the number
of errors counted on all paths until the changes are made, and the
state of exclusion from automatic failback are initialized. Monitoring
then restarts using the new settings.
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, intermittent error monitoring
will be started using the value stored in the system.
When the set -iem on operation is executed during intermittent error
monitoring, even if you do not change the error monitoring interval or the
number of times that the error is to occur, the history of errors on all
paths managed by HDLM, and the information of the paths excluded from
automatic failback are initialized. Intermittent error monitoring continues.
-expathusetimes number-of-path-use-times
Specifies the number of times the same path can be used for sequential I/
O operations when the extended Round Robin (exrr), Least I/Os (exlio),
or Least Blocks (exlbk) algorithm is used for load balancing.
6-18
Command Reference
Hitachi Dynamic Link Manager User Guide for VMware ®