Nero CD-DVD Speed 4.50 released with CLV/P-CAV scanning speeds for BenQ drives

http://club.cdfreaks.com/showthread....56#post1331456
Grab it and lets do some test!

good find



Only I cannot remember what P-CAV or CLV scanning was good for on our BenQ drives (for that matter I own a DW1620)... I have read it somewhere before, cannot remember where exactly...
I lost the information somewhere inside my head


Can any1 find a link or post or alike to inform me (and prob. others) ???

Really great thanks for info zevia and thanks to erik!

Thank-You Erik and also Zevia for the info.
YUDEN000 T02 @12x (Sony AccuCORE)
WOPC-on

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Last edited by jamescooley1; 22-05-2008 at 22:25.

Hrm... I'm getting scanning speed dips when using 8X P-CAV and 6X CLV scanning strategies. 8X CAV is still fine, though.

Anyone have any idea of what I should try to correct this?

Same speed dips for me with 8X P-CAV and 8X CAV.

Previous version was fine. Any ideas???

I burned this disc at 12X with Yuden000-T02-000@T03 with MCSE SB on OS off WOPC off. I scanned it twice once with 8x scan and once with 8xP-Cav.


http://club.cdfreaks.com/attachment....id=65536&stc=1

http://club.cdfreaks.com/attachment....id=65526&stc=1

Just for the record with my BenQ 1655 same speed scan dips at 8X P-CAV with me also. I am sure Zevia or Zebadee will fiqure this out, I did not get these speed scan dips with V4.11, only one at 380mbs.

Exactly what I was experiencing... v4.11 perfect (apart from first speed dip)... v4.5 multiple speed dips, with each one the drive sounds as if it totally spins down and spins up again, lengthening the scanning process

am i the only one without pcav clv options on v4.50?

At first, they didn't show up for me, either. However, when I changed the "read speed" in the options to "current" from "maximum", they appeared.

Try to do a refresh pressing this button

I can understand it showing up in p-cav, since if you have tried a 12x scan with your 1655 you will find it dips at this speed, as well as at 16x (all of these share the same initial angular velocity).

The other interesting thing about these dips is the spacing: distance increases between them as you move from 0 to 4.38 gigabytes. That says its not related to the actual reading of data but rather a radial distance (aka there is not a dip every 350 megabytes but rather every x mm from the center).

Anyways, rant off. I gotta try 8x p-cav :P

I had to hit the refresh button to get all speed options to show up.

Same here Qyngali, but it doesn't help with the speed dips using P-CLV with the BenQ 1655.

When the release of B7W9 solved an identical problem
with the 1620, I don't think any of us thought it was
a problem with CD-DVD Speed.
This puts things in a new light.

here is a bad disc, 6x CAV


Here is the *same* disc, 6x CLV


If you haven't noticed already, there is a great difference in the last 200 megabytes. While I haven't finished the 8x scan yet, I knew this disc was bad when I did the 6x CAV. Or wait, is it bad? Because according to 6x CLV its fine.

I guess the only way to know for sure is do a 1x scan of the last 400 megabytes, I will post one in a few.

Hi
This topic has been covered albeit briefly by Erik. It was his contention that the problem was f/w related (there was/is some reason to believe this to be the case). Some drives exhibit this 'flaw' regardless of media. While other show it with - media & not +. Quite often on release of new f/w this aberration disappears.

Hi
Thought this best in seperate post.
Problems I have with this version. When doing a full benchmark as the program gets to load/eject. Loses info in display window. See here: Write image will no stay ticked in options.

Benq drives will occasionally give unusually high error levels in the last few 100MBs of a disc, sometimes it will occur with high jitter levels near the edge but sometimes it can happen even without higher jitter, your disc has fairly high jitter so that could be contributing to it. I've seen it on a couple of discs that would scan with high errors at the edge on my Benq, but it would not show the elevated error levels on a Liteon - and before anyone says it is because I was testing a Liteon-burned disc on a Benq, it was a Benq burn, not Liteon burn. It has not been a very common occurance to have these strange scans (maybe 1 out of 15-20), perhaps CLV scanning will remove some of these 'odd' scans. I have a disc that I'm going to test at CLV to see how the scan turns out.

Thats the thing though, the end of disc error I get is media dependent. I have a whole stack of these (ricoh jprn03), all gave the end of disc spike that brought most scans from 90 to 0 quality.

Heres the real kicker. I scanned 4000-4482 for all modes between 1x and 8x. Only in the CAV modes did I get the error. P-CAV 8x, and all the CLV modes did not show a spike :/

Oh, and posting an 8x CAV pic of this disc finally:

Why is everyone reading at 6x now? I've always had the impression with BenQ's that 8x was the most preferable for it.

Here I did a test with newest version of cd-dvd speed. There are two scans: @8x and P-CAV 8x.

Sorry, it's in italian language, but I posted link for scans

I edited my post while you were posting, it could be the fact that the discs have pretty high jitter that is creating the rise at the edge, Benqs will sometimes be very sensitive to high jitter near the edge, to the point where they will occasionally even report POFs in the hundreds or thousands yet have a perfect or near perfect transfer rate test. It's usually not a common thing that I've seen, but then if all of those discs you are using have high jitter levels, they may all show similarly high error levels at the edge. I rarely see jitter levels that high from my Benq's burns, although the error spike at the edge can occur with 'lower' jitter levels, high jitter is the usual suspect but I've seen the error spike with a couple of discs with good jitter levels.

For me, this doesn't diminish the abilities of Benqs for scanning much, as I don't see this error spike very often and when I do, I treat the error spike with doubt and double check the disc with a Liteon quality scan and/or a transfer rate test.

Thanks geno. And just so no one gets confused when looking at your two scans, they are tests of two different discs.