Halc wrote:Intresting results RJW.
I've been meaning to order JVC DVD jitter test discs, but they cost 300+ euros. I can't afford them.
Can you say which LiteOn/Pioneer models have been tested with which discs (what kind of asymmetry/jitter level are we talking about).
Just take a look at C't if you didn't have the old numbers which specifically tell how there disc's works (Start point Up to the point were it rises.) then give me a e-mail.
Also, does anybody know at what kind of intervals do Pioneer dvd drives report PIE/PIF error counts?
To be honest, some of the LiteOn error counts are so low (esp. on cdr media) that they are bordering on believability. Sometimes I wonder what is the true accuracy of Mediatek chipset in reporting the errors...
CD-R media is low I know it will report much less errors as the (semi)profesional stuff. However it most times will be good enough to tell if a disc is good or bad or really bad. The middle area is were it becomes problematic. So avoid haveing disc's in it.
Somebody should really see a test showing correlation between error rates, read speed (esp. slow downs) and point of unreadability with various drives. I think it would be quite revealing.
Ever ran cdspeed C2 test. Well you can have it that only the speed drops marginally on a good drive while the disc is junk and it will say it's a good disc. (Drive that did was used was the old plextor 241040Ta (the dip was really small more like oh something needed the precious CPU cycles as a real dip we most time see with dvd recrodables when usseing a transfer rate test.) )K-probe and the semi-profesional tools and the plextor premium I have used will all say junk. ON which my bad cheap cd-rom drives agree.(AOPEN 40x and that sort of stuff.)
Mark that one as another one of those "interesting, but no time to do" tests
Well you might be lucky on that one a friend of me should have done some tests with different drives in cdspeed transfer rate test. While not perfect it's nice to see the differnt behaviour.
I can say Labtop drives are much more sensitive for shape problems.
A average slimline drive at 24x performs much near a average normal drive at 40x when it comes to problems because of shape (unbalanced, curved.)