Seagate Enterprise Performance - 3.5 HDD SAS Product Manual, Rev. B
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9.3
Drive mounting
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
9.4
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 maximum surface area ground connection is not provided 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
Breather
Ho
l
e
Do
Not
Cover
