Strange result of scanning

vbimport

#1

I bought benq OEM DVD burner(DW1620,G7C9 firmware).

I burned several DVD+R(Teon 8x and Memorex 8x) and scan the DVD+R for quality checking.

Yesterday,I flash the firmware to B7P9 and scan the DVD+R again to see if there are some difference.

I got very strange scan result.the scan under G7C9 firmware is very prefect and excellent quality.But the scan under B7P9 is not so good.pls check the picture I attached.

I am confused that the same DVD+R(burned using “G” firmware) is so different under diferent firmware.which result could I turst in?


#2

what version of cdspeed do u use


#3

3.55


#4

yindingmin, your 1st test was done at 4X. The 2nd at Maximum. I don’t know if this is the reason for the descrepency, but it might be worth trying the 2nd one at 4X.


#5

Whoops! did not catch test speed differences. Run both at 8X. (what most folks do with BenQ) Check results.

If still strange, this might be a possible bug from Nero 6.6.0.3 update?
Try older “stand alone” CDSpeed version (I use 3.42).

dishinit


#6

the result os more bad @4x scan.see the picture.



#7

1.3x scanning speed & no PIF with G7C9 firmware - this is OLD scaning engine.
High speed testing and PIF report are supported starting with M9 firmware.


#8

I focus on the result.Which is more accurately reflect the quality of Bunred DVD+R Disc


#9

New engine (with B7P9) is more informative and reliably.
Old engine with 1x speed is too much remissive, and PIF lack deprives you significant information about disk condition.


#10

Thanks GeoN!

I have to reburn the DVD+R to keep my data sate.data Safety is the 1# position for me.


#11

That looks like a bad flash or something really wrong with the test media. Try Q-scan to verify the media is similar before a comparative test. That way you can narrow down the source of the surprise.


#12

yindingmin,
Just wanted you to know that danielwritesback suggestion about testing your media has merit. A while back, I got a hold of some counterfit MCC 003 & it had me wondering, see this old post:
http://club.cdfreaks.com/showthread.php?t=95699
Fortunately your scans are not quite that bad. But I would definitely QScan the media, not definitive, but points in a direction. see if you can get some Ricoh R01/R02 or some 8X Sony DVD-R (BenQ 1620 loves them) to test with. That should eliminate the question “is it my media?”
And hopefully, it is.