| Citation : 
 
 # Service type: single disk
#  output:DISK OK - free space: /tmp 663 MB (90%):
 /output:DISK.*free space: (\S+) (\d+) MB \((\d+)\%\)/
 and push @s, [ $1,
 [ bytesfree, GAUGE, $2*1024**2 ],
 [ bytesmax, GAUGE, $3 ? $2*1024**2/$3*100 : 'U' ],
 [ pctfree, GAUGE, $3 ] ];
 
 
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