Sony DVDRW DRIVE VGP-DDRW4 - Manual (Page 31)

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Symptom Cause/Remedy
DVD+R DL (Double
Layer), DVD+R,
DVD+RW, DVD-R
DL (Dual Layer),
DVD-R, DVD-RW,
CD-R, or CD-RW
data reading or data
writing failure. c See “Precautions when writing data” on page 19.
c A bus reset may have occurred during the writing process.
For information, see “Bus Reset” on page 23.
c If writing fails due to a shortage of virtual memory on your
personal computer, increase the amount of virtual memory,
and then rewrite the data.
To increase the amount of virtual memory, do the
following*:
1 On the “Start” menu, click “Control Panel”, click
“Performance and Maintenance”, and then click
“System”.
2 Click the “Advanced” tab, and then click “Settings” in
“Performance”.
3 Click the “Advanced” tab, and then click “Change” in
“Virtual Memory”.
4 Increase the value of “Custom size”.
c Frames of video may be dropped if your hard disk is not
optimized. If this happens, optimize your hard disk.
To optimize your hard disk, do the following*:
1 Click the “Start” button, and then click “My Computer”.
2 Right-click the icon for the drive you want to optimize,
and then click “Properties”.
3 Click the “Tools” tab, and click “Defragment now”.
4 In the "Disk Defragmenter" window, click "Defragment".
* This operation is an example of Windows XP.