Seagate ST3500620SS Manual download pdf (Page 47)

Barracuda ES.2 SAS Product Manual, Rev. G 41

8.3 Drive mounting

Mount the drive using the bottom or side mounting holes. If you mount 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:

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.

Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate

Technology that the drive can meet the shock and vibration specifications given herein while

mounted in such an adapter frame. Adapter frames that are available may not have a mechanical

structure capable of mounting the drive so that it can meet the shock and vibration specifications

listed in this manual.

8.4 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 electri-

cally 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 mount-

ing the drive in the host equipment.

Increased radiated emissions may result if you 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.

K x X = F <

15lb = 67N

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Seagate ST3500620SS Manual Page 47