Hello! My first post here at cdfreaks! I'm very much hoping someone can help me out!
I have a new BenQ 1620, which I've upgraded to the latest firmware (B7U9) without any mods.
It's connected to my laptop computer (Dell Insp. 8600) via USB 2.0 using a Bytecc ME-320U enclosure. It's properly recognized by my operating system (XP Pro SP2). It seems to work fine for reading DVDs of all types, with results consistent with those posted in the review here of an earlier version of the drive.
When burning DVDs, for reasons that I can't pin down, everything seems to work fine for a while. The drive spins at a constant speed (audibly, at least), the red lamp flashes at a regular rate....
...and then, apropos of nothing, the drive goes into an (endless?) cycle of quickly spinning up, flashing its red lamp once, then spinning down. It does this three times in succession, then spins up a forth time, the red lamp flashes a few times, and then the drive spins down and the whole pattern repeats....
It seems to be willing to do this forever. Until I stop/cancel whatever the current software operation might be (it could be Nero DVD Speed doing a transfer rate test, a DVD copy program burning a copy, backup software writing a disk image) at which point, after it's completed its cycle, it again spins up, seemingly normal, as it did initially, remains that way for about 20-30 seconds, and then spins down, after which control returns to the software.
I'm using Ritek DVD-R (G05) media which QScan indicates are fine for both their rated speed (8x), and the 4x at which I've used them.
I'm at a loss as to what the problem is. I've read comments about chipsets associated with the enclosure... DMA issues (DMA is properly set on my laptop for all drives)... nothing seems obviously amiss.
What am I missing?