Grounding; Figure 5-3 Grounding Diagram - Western Digital Blue WD20SPZX Technical Reference Manual

Installation and Setup Procedures
5.3.3

Grounding

For best results, mount the drive with all four screws in the side grounded to the
chassis (positions A, B, C, and D below). You must ground the drive with at least one
mounting screw in position A (side mounting) or position 1 (top face mounting).
When mounting the drive in a chassis or system, the chassis or system should never
contact the cross-hatched area "E" to prevent electrical shorting of the PCBA or
drive. Contact should be limited to the side mounting (A,B,C, and D) or top facing
mounting (1 and 2).
Figure 5-3. Grounding Diagram
E
Side Mounting Use four metal screws in A, B, C, and D. If less than four screws are
–
used, remove in this order: C, D, and then B. You must use a screw in position A.
Top face Mounting–Use two metal screws in 1 and 2. Removal order does not matter.
You must use a screw in position 1.
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