i’m a newbie here, please help

I have the Nec 3500A flashed w/ 2.17 fw

When I burn a DVD-Video using 4x Maxell DVD-R media, the max. writting speed show from NERO burning software is 8x(11,080KB/s) but it always takes about 35 to 40min to burn a 4gig of movie.

the “remaining time” showed by nero is about 6-7min

but the “total time” to complete the DVD is 35-40min

Any help or Suggestion will be greatly appreciated!

Thanks