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Thanks for the extremely useful plugin! I've found a scenario in which the plugin reports a warning/error condition as unknown. The following output is given by the plugin,
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Unkown response from SMcli: " The following failures have been found: Insufficient Cache Backup Device Capacity Storage Subsystem: [[Array Name]] Component reporting problem: Not Available Status: Not Available Location: Controller/Drive enclosure, Controller in slot A Component requiring service: Controller in slot A Service action (removal) allowed: No Service action LED on component: Yes "
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I think that modifying line 114 to include "Insufficient" under the warning search would be a reasonable change. Would you concur?

== Changed Code ===
case "$RESULT" in
*optimal*)
echo $RESULT
echo "OK"
exit $STATE_OK
;;
*failure*)
case "$RESULT" in
*failed*|*Failed*|*Unreadable*)
echo $RESULT
echo "CRITICAL"
exit $STATE_CRITICAL
;;
*preferred*|*Preferred*|*Expiration*|*Insufficient*)
echo $RESULT
echo "WARNING"
exit $STATE_WARNING
;;
*)
echo "Unkown response from SMcli: \" $RESULT \""
echo "UNKNOWN"
exit $STATE_UNKNOWN
;;
esac
;;
====