Space used: {ITEM.LASTVALUE3} of {ITEM.LASTVALUE2} ({ITEM.LASTVALUE1})
Two conditions should match: First, space utilization should be above {$VFS.FS.PUSED.MAX.WARN:"{#FSNAME}"}.
 Second condition should be one of the following:
 - The disk free space is less than 10G.
 - The disk will be full in less than 24 hours.