DVD-RAM is one of many available formats used for creating re-writeable dvd disks. These are typically used in camcorders and other devices that utilize re-recordable dvd disks.
i dont know he doesnt know also
SLIMLINE DD ROM FOR LAPTOPS dD ROM
From wikipedia: DVD-RAM is considered a highly reliable format, as the discs have built-in error control and a defect management system. Therefore, DVD-RAM is perceived to be better than the other DVD technologies for traditional computer usage tasks such as general data storage, backup and archival.