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Originally Posted by rob7bt  People should only scan with a certain drive ALWAYS,this would then give people a alot clearer results to think for themselves. |
I don't agree, I think just the contrary. A really good disc/burn reads back and tests well in any drive, which is to me the definition of a really good disc/burn. A disc that reads/tests great in 1 drive but poorly in the next is in my view a marginal disc/burn and not worth considering.
I'm selecting my media and burning methods this way. The resulting discs must test good in all my drives. I'll never trust a disc showing problematic results in a given drive, and will never accept the excuse that "this drive is a crappy reader" or "this drive is not a good scanner" (unless this drive has issues reading or scanning ALL discs).
But to compare different burns of a given blank model, or to test for degradation, yes, the same drive MUST be used.
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Now what would happen if the 1650 scan showed very different results?
Would it mean the drive that wrote it is rubbish,or does it mean the dw 1650 is rubbish at scanning?
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You're oversimplifying: these are not mutually exclusive, and other possibilities also exist.
- The 1650 can be rubbish at scanning
- The NEC drive can be rubbish at burning
- The NEC drive can be OK as a writer but not good enough to produce a burn that would read well in all drives
- The 1650 could be a pickier reader for this particular disc model (but could still be outstanding with other disc models)
- ... you can find other possibilities if you think about it some more (I found at least 3 more
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On the forum people ask for a good reader/writer and 9/10 The 20A1S is at the top of the list,but then why in a 20A3P thread dont they use the 20A1S if its "known" to be a good reader?
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You mean to test discs? Well, it's not very useful to test with the best readers around. On the contrary, using picky readers to test discs gives far safer results. But I'm not sure that's what you ask.
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Why is it so important for dvd writers to be able to read back discs they wrote aswell(apart from putting plain old pc data on them)
I think the majority of people on here more than likely put video on them for standalone dvd players console playback etc.
Like bob said over the years i have scanned various disc and TRT showed such bad results,people here would throw it in the bin,but they play back fine a my old cheap as chips player!
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In YOUR player, maybe. Why do you assume it would read OK in another player? That's the main point of testing. Someday, maybe tomorrow, you could well have to buy a new standalone player. What then if the borderline discs don't read well in the new player?
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A writer is a writer so shouldnt review/scans etc praise manufacturers on their dvd writers, outstanding writing performance and not sl_g a drive off because its not as good a reader!
You have 1650/55 20A1 series of drives for reading!
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Why do you think that everyone uses several drives? Not everyone is a CDFreak, most users out there have a single drive to write AND read. These reviews adress all users, not only people who have several drives.
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I think threads on DVD Writers writing performance shouldnt be able to use the drive that wrote it,only "known" good readers i.e DW 1650/55 20A1 type drives.
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No, they should use known picky readers for reading tests, and
several known trustable scanners for PIE/PIF/jitter tests.
I more or less understand your line of thoughts, but you have even more thinking to do IMO.
