This article was previously published under Q132882
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When you are copying a large directory structure from a CD-ROM drive toa local hard disk, your computer may stop responding (hang). You mustperform a local reboot to end the copy task and regain control of yourcomputer.
The Windows CD-ROM file system with protected-mode drivers includes a"Read-Ahead" feature that is designed to provide smoother video playback,with faster and more efficient data streaming. The Read-Ahead feature cancause the CD-ROM drive controller to be driven faster than it was designedto be.
To prevent this problem, follow these steps:
Click the Start button, point to Settings, then click Control Panel.
Double-click the System icon.
On the Performance tab, click File System.
Click the CD-ROM tab.
In the Optimize Access Pattern For box, click the setting that matches the CD-ROM drive you are using. Click OK. Restart the computer when you are prompted to.
If steps 1-5 do not solve the problem, repeat steps 1-4. In the Optimize Access Pattern For box, click No Read Ahead. Click OK. Restart the computer when you are prompted to.
The following table describes the Optimize Access Pattern For settings: