additional information refer to:
http://www.sun.com/io
Installing Additional Peripheral Devices
When you add additional storage devices, refer to the Rackmount Placement Matrix, at http://docs.sun.com, for the mounting hole numbers of the mounting screws for Sun Microsystems disk arrays, other storage trays, and devices.
Unless otherwise specified in the Rackmount Placement Matrix, mount the heaviest subassemblies at the lowest available opening. This placement minimizes the effects of a
Refer to the installation guide for the peripheral device for additional instructions.