Sony DVDRW DRIVE VGP-DDRW4 - Manual (Page 32)

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Symptom Cause/Remedy
Cannot write data. c If this drive has not been recognized correctly by the
personal computer, normal read/write operation is not
possible. See the section “Drive is not connected
correctly to the personal computer” on page 29.
c If the drive was brought from a cold to a warm location,
condensation may have formed inside the drive. Allow
the unit to stand for a while.
c The DVD+R DL (Double Layer), DVD+R, DVD+RW,
DVD-R DL (Dual Layer), DVD-R, DVD-RW, CD-R, or
CD-RW disc may already be full. If a disc is full, you
cannot add data.
c You cannot write data to DVD+RW, DVD-RW, or CD-R
discs for which data writing ended in failure. Delete the
data and then rewrite the disc.
Follow the procedure below to delete data from
DVD+RW, DVD-RW, or CD-RW discs. (Use the
RecordNow! software.)
For details on how to delete data, refer to “Help” of the
software installed on your personal computer.
c Once you write data to a DVD+R DL (Double Layer),
DVD+R, DVD-R DL (Dual Layer), DVD-R, or CD-R
disc, you cannot rewrite data on the disc. Also, you
cannot delete data written on the disc.
c Make sure that the disc has been inserted correctly with
the side to be recorded facing down.