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Article ID: 132882 - Last Review: January 19, 2007 - Revision: 1.3
Computer Hangs Copying Data from CD-ROM Drive
This article was previously published under Q132882
When you are copying a large directory structure from a CD-ROM drive to
a local hard disk, your computer may stop responding (hang). You must
perform a local reboot to end the copy task and regain control of your
computer.
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 can
cause the CD-ROM drive controller to be driven faster than it was designed
to 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:
Setting Behavior
-------------------------------------------
No Read Ahead Read ahead 0 bytes
Single-speed drives Read ahead 50K bytes
Double-speed drives Read ahead 100K bytes
Triple-speed drives Read ahead 150K bytes
Quad-speed drives Read ahead 200K bytes
If you are not sure of your CD-ROM drive's transfer rate, please consult
the drive's documentation or manufacturer.
APPLIES TO
- Microsoft Windows Millennium Edition
- Microsoft Windows 98 Second Edition
- Microsoft Windows 98 Standard Edition
- Microsoft Windows 95
| kbfaq kbhardware kbmm kbprb KB132882 |
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