Sony PCG-FXA49 - Manual (Page 25)

Using the Optical Disc Drive
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❑ If your notebook computer has preinstalled Microsoft® Office applications,
such as Excel, Word, and Outlook, turn off the FindFast application.
Do not strike or shake the notebook while writing data to a disc.
Always use the AC adapter as the power source for your notebook if you are
writing data to a CD-RW or CD-R disc. Using battery power may result in data
transfer failure.