IF THE PROBLEM REAPPEARS ON A DIFFERENT COMPUTER SYSTEM, IT IS LIKELY THATTHE USB HARD DISK IS DEFECTIVE

4.

Correct Answers: A, C, and D

A. Correct:

If the problem reappears on a different computer system, it is likely that

the USB hard disk is defective. If it performs as expected on the other computer,

the problem is specific to the original computer.

B. Incorrect:

It is possible that having too many USB devices connected can cause

problems because there is not enough power available for all devices. There are

limitations on how much power each individual USB device can draw from the

USB chain; if a USB device tries to use more than 500 milliamps of current, the

port is disabled until the system is rebooted. The total amount of power used by

all the devices is also limited. However, the question states that you connected the

USB disk drive’s power plug, which means that it will not be using much current

from the USB connection. Additionally, USB mouse devices and Pocket PCs nor-

mally use a trivial amount of electric current from the USB connection.

C. Correct:

If this step resolves the problem, you have determined that the issue

was caused by the USB hub or its connection to your computer. Try power cycling

the hub and plugging it into an alternate port on your computer.

D. Correct:

When Windows XP Professional detects problems with USB devices, it

writes error messages to the System event log. These messages can provide use-

ful troubleshooting information. Another important step to take when resolving