Udf Certify - Ulead BURN.NOW 4.5 User Manual

50 ULEAD BURN.NOW USER GUIDE
• Full format - Completely formats a disc using the selected UDF file system, and
writes new tracks and sectors onto the disc. This formatting method takes a longer
time to complete, but it makes the disc error-free. Burn.Now supports full formatting
of all types of discs.
If Full format is selected or your disc had been fully formatted and you are using the
UDF 2.5 file system, you can select the Mirror UDF metadata option. This records 2
copies of your data structure in physically separated areas on your disc to enhance
the readability of your disc.

UDF Certify

For a UDF formatted DVD-RW and CD-RW, you can apply disc certification to scan the
disc and check if there is any problem. The certification process marks bad sectors to
improve future writing reliability. On DVD-RW and CD-RW burners that support DRT-DM
(Distributed Real-Time Defect Management), the certification process also moves the
data in the recoverable defected sectors (DRT-DM Level-1 and Level-2 defects, if any) to
healthy sectors for further improvement in data reliability.