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SEAGATE ENTERPRISE CAPACITY 3.5 HDD V4 SAS PRODUCT MANUAL, REV. A 46
10.3 DRIVE MOUNTING
Breather Hole
Do Not
Cover
Mount the drive using the bottom or side mounting holes. If mounting the drive using the bottom holes, ensure the drive is not physically
distorted by attempting to mount it on a stiff, non-flat surface.
The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable mounting
surface stiffness:
where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion (units in inches or millimeters).
The out-of-plane distortion (X) is determined by defining a plane with three of the four mounting points fixed and evaluating the out-of-plane
deflection of the fourth mounting point when a known force (F) is applied to the fourth point.
Breather hole location - top cover
10.4 GROUNDING
Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in which
the drive is mounted is connected directly to the HDA and PCBA with no electrically isolating shock mounts. If it is desired for the system
chassis to not be connected to the HDA/PCBA ground, the systems integrator or user must provide a nonconductive (electrically isolating)
method of mounting the drive in the host equipment.
Increased radiated emissions may result if users do not provide the maximum surface area ground connection between system ground
and drive ground. This is the system designer’s and integrator’s responsibility.
NOTE
Do not cover breather hole on top cover.
K x X = F < 15lb = 67N