Burn speed question

[NightTran]

I collect my own data to support my speed burn, every time I get new media I still have to do it over and over again. I am not that good, I am still learning alot from this forum and practice make perfect

[Chewy]

well here's where I put my scans up to prove a point
both burns with 2 consecutive disks off spindle of 100 verbatim 16x
dvd+r burned in LG4136B
first scan of burn at 4x in 12 minutes
2nd scan of burn at 8x in 6 min 31 sec

[costanza]

What is supposed to be the significance of these quality scans? I mean, each has some things better and some things worse than the other.

[sonic_emperor]

did i get sth wrong,quality scores are the same...i use this media,so that makes it interesting for me,do score depend on comp.configuration?
and i wold need explanation of -
PI errors/failures
jitter?

[Chewy]

The 3 most important factors are(in order of their relative value)
PIF totals, PIE total and then jitter. All with qualification. The burn at 8x just slightly edges out the 4x burn in my opinion, since it's 5 1/2 minutes faster, the choice is obvious. After 6 months I am still learning to interpret
these scans.

http://club.cdfreaks.com/showthread.php?t=96285

What is supposed to be the significance of these quality scans? I mean, each has some things better and some things worse than the other

do it yourself and see what's best for you

[enviroguy]

I've been wondering this for awhile. I use a benq 1640. I rip with DVDD and burn with nero. I use Fuji -R16x. I usually burn at 12x but have not had trouble at 16x. I only use 12x becsue of all the warnings on this forum. If the movies play well, is there any other reason to burn more slowly?

[Chewy]

is there any other reason to burn more slowly?

if a quality scan or transfer test shows problems with a 12x burn then try
an 8x burn and test

the difference in time from 8x to 12x to 16x is minimal

fuji made in japan or tawain?

[locoeng]

@Chewy

I should know the answer to this and probably do, but both of the scans you posted showed the test speed as 8X...Shouldn't the tests be run at the same speed as the burn?

Good scans by the way, verbatim is top notch.

[soup]

@chewy our Real Canadian Superstore here are selling Fuji (made in Japan) but they are $5.98 per 5 pack.It didn't seem like that good a deal not when I have seen some of the deals you guys have posted.

[Chewy]

Shouldn't the tests be run at the same speed as the burn?

burning speeds and scanning speeds are 2 completely independent things,
both need to be tested and set individually.

The benq's(premium scanners) are best at 8x. Lower you waste time, higher
you end up graphing read errors.

[locoeng]

Gotcha

[geno888]

Okay. That answers my question. I'm not doubting you, but do you have any "white paper" data to back it up? In other words, where did you get this info? Thanks!

I think that Chewy already answered to this question. Sorry if I didn't answered by myself: I live in Italy, and because of time differences I wasn't able to answer until now.

I confirm that my knowledge come from my readings on CDFreaks, but also from my personal experience with burnings.

Most of informations come from scans, a test made with cd-dvd speed. Not all burners support this function. The most reliable are liteon, benq, and plextor drives. Plextor drives, however, are also the most costly drives. And only burners can do reliable scans: dvd-rom readers cannot be used for scans.

Right now I can't find a scan of a 16x media burned @4x, but I assure you that is almost a coaster (still readable, but with very high errors). Here I posted two images. The first image is a 8x certified media burned @12x (very good quality media can be burned faster than certified speed), and the second the same media burned @8x. You can see that also at high speed can be reached very good results.

I'll search some images of a 16x media burned @4x, and I'll post here. So you can see differences.

[geno888]

As promised, here there are three scans of the same disc, Ricoh +R 16x certified, burned at different speeds: 4x, 12x, and 16x.

You can see that 16x is not the best result, but 4x is the worst result obtained. The best result is @12x.

[Chewy]

geno see if the pif total at 8x is lower?

[geno888]

I'll do a disctest and post when done