Hi !!! I'm not sure where to put this in Sony or Optiarc but since my Optiarc is new and the problematic one is an old Sony, I guess I'll put it here. I apologize if it's not appropriate and please do move this thread to the appropriate section.
I have an old Sony DRU-720A with FW JY08. It was my main burner until recently I learned more about DVD burning from this forum and decided
to purchase a Sony Optiarc AD-7240S with the latest FW. At that time around I also learned about the importance of quality scanning and
transfer rate test. So since then I've been starting to do quality scans to all my next burn and previous burns. I have the DRU only to do quality scans.
Before purchasing the Optiarc, I burned a lot of DLs with the DRU at 2.4x speed and I only use MKM-03-00. Having never do quality scans on those burns, I started to do quality scans on them with the DRU. Strangely enough not all are recognized by the DRU. When it recognizes, I get a 91%-99% quality ratings.
But when it doesn't, the DRU makes noises like it's trying hard to read the disc. It makes noise like : rrrrrr then stops then rrrrrr then stops and this goes for about 8 times before it really stopped. And when I go into DVDInfo and try to start a PIPO scan on it, DVDInfo gives 'Waiting For Device To Become Ready' message and freezes. When I open Task Manager it would say DVDInfo not responding so I had to kill it.
The statistics are as follows :
-Total burned DLs are about 29 discs and all are MKM-03-00 and burned with ImgBurn at 2.4x.
-From that total, 22 are recognized and 7 aren't.
-From the 22 that are recognized, 17 have quality ratings between 91%-99% and 5 have quality ratings between 51%-73% (Only 1 has 51.75% while the rest have above 70%)
-The 7 that aren't recognized, I gave them a try with the Optiarc and the Optiarc recognizes them. So I scanned them and they have quality
ratings between 55%-86%. (Only 1 got 55.92%, 2 is all green and the rest is greens and yellows)
My questions are :
Why is my DRU-720A won't recognize ALL of my burned DLs ??? Is it dying ??? Or is it the media ???
I learned that the DRU is better for quality scanning than the Optiarc because of the DRU-720A being a rebadged Lite-On and the Optiarc's
inability for jitter scanning. Is this true ??? Please CMIIW.
If true, would the scan results done with the Optiarc, representative enough to give me ideas about how good those burns are ???
Did someone have a similar experience ???
What is your suggestion/solution for this ???
Thank you very much in advance for your kind answers.