This excerpt taken from the WDC 10-K filed Nov 20, 2006.
We may be unable to retain our key personnel and skilled employees.
Our success depends upon the continued contributions of our key personnel and skilled employees, many of whom would be extremely difficult to replace. Worldwide competition for skilled employees in the hard drive industry is intense. Volatility or lack of positive performance in our stock price may adversely affect our ability to retain key personnel or skilled employees who have received equity compensation. If we are unable to retain our existing key personnel or skilled employees, or hire and integrate new key personnel or skilled employees, or if we fail to implement a succession plan to prepare qualified individuals to join us upon the departure of a member of our key personnel, our operating results would likely be harmed.