Toshiba Portege R30-A - Manual (Page 67)

DVD-R DL:
MITSUBISHI KAGAKU MEDIA CO., LTD.
DVD+R:
MITSUBISHI KAGAKU MEDIA CO., LTD.
TAIYO YUDEN CO., Ltd.
DVD+R DL:
MITSUBISHI KAGAKU MEDIA CO., LTD.
DVD-RW:
Victor Company of Japan, Ltd. (JVC)
MITSUBISHI KAGAKU MEDIA CO., LTD.
DVD+RW:
MITSUBISHI KAGAKU MEDIA CO., LTD.
DVD-RAM: (DVD Super Multi drive only)
Panasonic Corporation
Hitachi Maxell, Ltd.
BD-R:
Panasonic Corporation
BD-R DL:
Panasonic Corporation
BD-RE:
Panasonic Corporation
BD-RE DL:
Panasonic Corporation
BD-R TL:
TDK.
BD-RE TL:
Panasonic Corporation
Some types and formats of DVD-R DL and DVD+R DL discs may be
unreadable.
Disc created in DVD-R DL format4 (Layer Jump Recording) cannot be
read.
User's Manual 4-18