Consider the following scenario:

  • On a ThinkPad X300 computer that is running Windows Vista, you enable the Disable optical drive option on the Power Management tab.
  • You leave the system idle for more than 10 minutes, and the optical disk drive turns off.
  • You perform a suspend-and-resume cycle or a hibernate-and-wake cycle on the computer.

In this scenario, the computer’s optical disk drive is intermittently not displayed in My Computer or in Device Manager.

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