Drive Mounting; Grounding; Air Flow - Seagate ST2400MM0129 Product Manual

If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 13. The air-flow patterns are created by one
or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-flow patterns are
acceptable as long as the temperature measurement guidelines of Section 6.6.1 are met.
Figure 13.

Air flow

Image of the HDA may not represent actual product, for reference only.
Note
10.3

Drive mounting

Mount the drive using the bottom or side mounting holes. If mounting the drive using the bottom holes, ensure to not physically
distort the drive 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:
K x X = F < 15lb = 67N
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.
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 maximum surface area ground connection is not provided between system ground and
drive ground. This is the system designer's and integrator's responsibility.
Seagate Enterprise Performance 10K HDD v9 Product Manual, Rev. D (Draft 2) 48