This object identifies the runing state of the disk.
The value of 'on' means the blue led is on, and the disk works well.
The value of 'blink' means the blue led is blinking, and the disk
is being readed or writed.
The value of 'fastblink' means the blue led is blinking very fast,
and the disk is being located.
This object can not be 'fastblink' when the value of associated
hh3cDiskLocationState object is equal to 'disable'.