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Handles (5): There are handles on both sides of the enclosure for users to
pull / push the enclosure out and into the cabinet when the enclosure is
installed on a slide rail rackmount system.
Rackmount holes (6): There are two rackmount holes (one on each side
of the enclosure) for users to secure the enclosure onto the cabinet.
Hard drive status LED (7): There is a set of hard drive status LEDs on
each hard drive tray or right hand side or below of it to indicate operation
status.