I don't know the exact details, but the principal of DVD-RAM is, that it has
random access unlike DVD-/+RW. There are two format types on DVD-RAM, one
for data and one for video. Windows XP can read and write to DVD-RAM-drives
without any special driver. I know this, because I have a dvd-videorecorder
and a dvd-ram-writer for my PC. Also there are at least five types of
DVD-RAM(two doublesided cartridges, two singlesided cartridges and one
without a cartridge. The differences between the cartridges are the size. I
know the types I use(type 2 and 4) are relatively 4,7GB(single) and 9,4
GB(double) in size. Also important is, that DVD-RAM can be written to one
hondred thousand times, while other standards can only be written to a
thousand times. and DVD-RAM(30 years) last 10 times longer than other
standards(3 years)... The only advantage of DVD-/+RW is, that it is more
widely spread. To be honest with you, it is difficult enough to find an
internal dvd-ram-writer for a PC, let alone a laptop...
Nico.