DVD question - tangentially MASM related

[Merrick]

OK. It's only MASM related if someone wants to write MASM code to figure it out...

Assuming you have a DVD drive that will recognize any number of DVD formats (DVD+/-R/RW/ROM/etc) how can one figure out which format a disc currently in the drive is written in?

[evlncrn8]

typically using spti and some ioctl's... for 9x/me you have to do it a different way - either aspi or through a vxd