Hitachi HDS721050CLA362 - Figure 6 Bottom and Side Views with Mounting Hole Locations

HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
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Figure 6 Bottom and side views with mounting hole locations
All dimensions in the above figure are in millimeters.
The breather hole must be kept uncovered in order to keep the air pressure inside of the disk enclosure equal to
external air pressure.