Drive Orientation; Cooling; Drive Mounting; Figure 18. Recommended Mounting - Seagate ST31250N Product Manual

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7.6.1
7.6.2
7.6.3

Drive orientation

The balanced rotary arm actuator design of the drive allows it to be mounted
in any orientation. All drive performance evaluations have been done with the
drive in horizontal (discs level) and vertical (drive on its side) orientations,
which are the two preferred mounting orientations.

Figure 18. Recommended mounting

Cooling

Ensure that the enclosure you use provides adequate cooling so that the
ambient temperature immediately surrounding the drive does not exceed
temperature conditions specified in Section 7.4.1. Ensure that you provide
adequate air circulation around the printed circuit boards (PCBs) to meet
the requirements of Section 6.2.2.

Drive Mounting

Mount the drive using the bottom or side mounting holes. If you are mounting
the drive using the bottom holes, ensure that you do 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:
F 80 lb
=
k =
x in
where k is the mounting surface stiffness (units in pounds or newton) and x
is the out-of-plane 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 defection of the fourth mounting
point when a known force (F) is applied to the fourth point.
Barracuda 2LP Product Manual, Rev. D
14.0 N
or
mm