hi, i posted a while ago with 1633s issues. i posted a bunch of scans showing pi in the 1000s and po in correspondingly scary amounts. cd/dvd speed often wouldn’t even make it halfway through.
so i got me the sd-r5372 cos the local store was out of 3500 which i was going to try. just for kicks before really tossing the 1633, i ran a couple of comparative tests with kprobe… i had bought a liteon dvd-rom as a dedicated scanner because i didn’t trust the 1633 (which upon scanning a disc burned on the sd-r5372 gave the same usual outrageously crappy results) and because the sd-r5372 cannot do scanning.
it now seemed that the vaunted reading ability of the liteon 1633 was really at fault, and so i ran a couple of comparative scans. i burned the same disc on the toshiba and liteon, and read them both in the liteon dvd rom (and did this four or five times). lo and behold, on TY02 media, the liteon gave amazing results! the toshiba also produced some pretty sweet scans, but not as good as the 1633. i double checked with transfer tests in cd/dvd speed on both the liteon dvd rom and the toshiba, and they were all very nice & smooth. i also checked two result sets in dvdinfopro. i mean, we’re talking now results like pi max 30, avg. 4, po max 2, avg. 0.32, 0 errors.
what’s more is that i scanned some of the discs i’d made before and given up on as coasters but didn’t throw out cos i’m lazy and my desk is a mess, and guess what? even these dirty, ashed-on, slightly scratched-up discs gave great results too! the sd-r5372 was able to copy all the contents of these and the newer discs to the hd with what i assume to be average speed for a dvd drive, i.e., maybe about 4-5 min. and this is on a variety of media including prodisc, mkm, mcc, ty and cmc.
so the conclusion of the tests = my liteon burns great dvds and has great tweakability thanks to omnipatcher, etc., but cannot read anything consistently well, cannot do accurate scanning, and it even has issues with reading and copying files from pressed media with virtually no scratches or dust!
my question is, can i trust the burning ability of the 1633 drive even though it has so many difficulties reading media and copying files? i don’t want to have to use kprobe or run any of these tests that take forever every time i burn a disc, but accuracy is more important to me than how long it takes… is the same laser used to read and write, just focused differently? and is there any way i can find out why the reading ability on this drive stinks, and maybe how to fix it? thanks to lots of your suggestions when i thought the whole drive was bunk, i tried many many many things ranging from replacing ide cables to firmware upgrades to messing around in my registry. nothing changed the crappy reading on the drive though.