Patent ID: 7499271

Claim:
A hard disk enclosure blade comprising: an enclosure insertable into a rack; a plurality of slots, each slot receptive to a tray capable of holding one or more hard disk drives; a lever by which the enclosure is pushed into the rack and pulled out of the rack, the lever having an open position in which the enclosure is removable from the rack and a closed position in which the enclosure is not removable from the rack; and, a flap having a first flap position in which the flap is disposed across the slots and the lever is movable from the closed position to the open position, and a second flap position in which the lever is not movable from the closed position to the open position, wherein where the slots are all empty, the flap reverts to the first flap position, and where insertion of a tray into one of the slots forces the flap to the second flap position.