User’s Manual 4-11
Operating Basics
■ If the disc is poor in quality, dirty or damaged, writing or rewriting errors 
may occur. Be careful to check the disc for dirt or damage before you 
use it.
■ The actual number of rewrites to CD-RW, DVD-RW, DVD+RW or 
DVD-RAM is affected by the quality of the disc and the way it is used.
■ There are two types of DVD-R discs: authoring and general use discs. 
Do not use authoring discs. Only general use discs can be written to by 
a computer drive.
■ We can support only format 1 of DVD-R DL. Therefore you can not do 
the additional writing. If your data is under DVD-R(SL) capacity, we 
suggest to use DVD-R(SL) media.
■ You can use DVD-RAM discs that can be removed from a cartridge and 
DVD-RAM discs designed without a cartridge. You cannot use a disc 
with a 2.6 GB single-sided capacity or 5.2 GB double-sided capacity.
■ Other DVD-ROM drives for computers or other DVD players may not be 
able to read DVD-R/-R DL/-RW or DVD+R/+R DL/+RW discs.
■ Data written to a CD-R/DVD-R/DVD+R disc cannot be deleted either in 
whole or in part.
■ Data deleted (erased) from a CD-RW and DVD-RW, DVD+RW and 
DVD-RAM disc cannot be recovered. Check the content of the disc 
carefully before you delete it. If multiple drives that can write data to 
discs are connected, be careful not to delete data from the wrong drive.
■ In writing to a DVD-R/-R DL/-RW, DVD+R/+R DL/+RW or DVD-RAM 
disc, some disc space is required for file management, so you may not 
be able to write the full capacity of the disc.
■ Since the disc is based on the DVD standard, it will be filled with dummy 
data if the written data is less than about 1 GB. Even if you write only a 
small amount of data, it might take time to fill in the dummy data.
DVD+R MITSUBISHI KAGAKU MEDIA CO., LTD
Ricoh Co., Ltd.
DVD-RW DVD Specifications for Recordable Disc for Version 1.1
VICTOR COMPANY OF JAPAN, LIMITED
MITSUBISHI KAGAKU MEDIA CO., LTD
DVD+RW MITSUBISHI KAGAKU MEDIA CO., LTD
Ricoh Co., Ltd.
DVD-RAM DVD Specifications for DVD-RAM Disc for Version 2.0, 
Version 2.1 or Version 2.2
Matsushita Electric Industrial Co., Ltd.
Hitachi Maxell Ltd.
DVD+R DL MITSUBISHI KAGAKU MEDIA CO., LTD.
DVD-R DL MITSUBISHI KAGAKU MEDIA CO., LTD.
This drive cannot use discs that allow writing of 8 speeds or more (DVD-R, 
DVD+R ), 6 speeds or more (DVD-RW) and 8 speeds or more (DVD+RW).