Non-native IDE controllers degrade DVD burn quality at high speeds?

vbimport

#1

So I was doing some burn testing on JVC / TY 8x DVD+R media (YUDEN T02) and noticed something weird. I have a Optiarc 7200A and a Optiarc 7200S and was testing them both. According to the nice chart Liggy and Dee put together they have the same DVD+R write strategies so I would expect them to burn similarly, and they do except at high speeds >8x.

Here are the scans from the 7200S at 4x, 6x, 8x, 12x, & 16x respectively:


#2

Now here are the scans from the 7200A at 4x, 6x, 8x, 12x, & 16x respectively when connected via a USB2.0 to IDE controller (Cypress CY7C68300C-56PVXC):







#3

Then I tried the 7200A on a IDE port in my desktop PC at 12x and 16x. The IDE is from a JMB363 chipset.

Here are the scans from the 7200A at 12x & 16x respectively:




#4

The drive doesn’t seem to be the problem at 12x, but the Cypress USB to IDE interface. It seems both the JMB363 and the Cypress USB to IDE interface cause a problem at 16x.


#5

This just makes this particular 7200A look like a bad drive.


#6

[QUOTE=Albert;2697129]This just makes this particular 7200A look like a bad drive.[/QUOTE]Maybe… I will have 2 more in a few days to compare against. I dusted off an old P4 box in the basement with an Intel ICH4 that has native IDE channels, put the drive in it and tried 12x and 16x and got this:




#7

I broke out another IDE burner from my stash a TSST SH-S222A and burned one of the discs at 12x, the fasted speed it supports for YUDEN T02 media. This was done on the Intel native IDE controller in the P4 box and I got this. It would appear that the IDE interface is not a limiting factor and that Albert may be correct.



#8

It doesn’t seem like the speed of at least the native PATA interface is a limiting factor. It has no problems feeding the SH-S222A for a 16x or even 22x burn (on MCC004 / Verbatim 16x media). It’s looking more like the drive is damaged / bad. I guess I will know definitively when I receive the other drives.




#9

[QUOTE=Albert;2697129]This just makes this particular 7200A look like a bad drive.[/QUOTE]It looks like Albert is correct. Another 7200A burns fine at 12x and 16x.

Here are the scans of burns from another 7200A at 8x, 12x, & 16x respectively when connected via a JMB36x PCIe to IDE controller.

It also looks like the 7200A and 7200S burn equivalently (at least on YUDEN T02).





#10

Just to bring this all the way to a final conclusion, here are scans of a 12x and 16x burns from an AD-7200A in the same USB enclosure I used earlier in the thread.