What is the minimum static charge able to cause disk drive data loss?

A.
550 volts

B.
1000 volts

C.
1500 volts

D.
2000 volts

Explanation:
Low humidity of less than 40 percent increases the static electricity damage potential. A static charge of 4000
volts is possible under normal humidity conditions on a hardwood or vinyl floor, and charges up to 20,000 volts
or more are possible under conditions of very low humidity with non-static—free carpeting. Although you cannot
control the weather, you certainly can control your relative humidity level in the computer room through your
HVAC systems.
The list below lists the damage various static electricity charges can do to computer hardware:
40 volts: Sensitive circuits and transistors
1,000 volts: Scramble monitor display
1,500 volts: Disk drive data loss
2,000 volts: System shutdown
4,000 volts: Printer Jam
17,000 volts: Permanent chip damage
Incorrect Answers:
A: 550 volts is not enough to cause disk drive data loss. Therefore, this answer is incorrect.
B: 1000 volts is not enough to cause disk drive data loss. Therefore, this answer is incorrect.
D: Only 1500 volts is enough to cause disk drive data loss, not 2000 volts. Therefore, this answer is incorrect.

Krutz, Ronald L. and Russell Dean Vines, The CISSP and CAP Prep Guide: Mastering CISSP and CAP, Wiley
Publishing, Indianapolis, 2007, p. 460