Nero verification: any point ?

[El Chupacabra]

I use Nero 5.5.10.54 to burn DVD+/-R. I've been using the optional verification after burn, but am wondering whether it makes any difference. I did a search through the forum, and while I didn't find any specifics on what this verification process actually is, I noticed a few comments about how it was either (a) flawed, or (b) worthless.

All I know for sure is that it adds about 10 minutes to a burn (on 1x media). So -- can anyone shed any light on this ? Is the Nero verification process worthwhile at all?

[tito13kfm]

well I don't burn with nero, nor do I verify with the burning program.

I always open up the burned disc in dvdinfopro and let it check for errors though (well not always, but before I ship a finished disc to a customer I do) Verification is probably like a crc check where it compares the error correcting codes on the disc with what is on the hard drive, it's not perfect, but comparatively fast when compared to a complete check using dvdinfopro.

[johns0]

I use the nero verify and its never left me down or failed.

[garryheather]

If you've got an iffy batch of media and / or use cheap media where the results are not consistent, it's handy to get Nero to check the disc afterwards if you tend to set it off and go and do something less boring instead.

For example, if you've got some media where it starts getting somewhat unreliable at say 4Gb and you've just burnt 3.9Gb to it, it's probably a good idea to verify it to make sure those last few files are readable.

Just be advised your recorder may do a better job of reading troublesome discs than the intended target device, so this doesn't necessarily assure you of anything.

Nero's CDSpeed application offers a slightly more subjective test for "the real world", where it allows you to see where the disc starts getting flaky.

If you're really, really paranoid about these things, there are utilities out there that do true CRC, and even bit for bit comparisons of files which, if you have a few hours to spare, will make sure the data is as intended.

eg: http://www.elpros.si/CDCheck/news.php

[Gil T Pleasure]

A few weeks ago, I burned a movie to DVD+RW using Nero (ver 5.5) and it failed the verification even though the burn itself was successful. And the 'failed' disc played fine on my DVD player/ROM drive. Go figure...

[duhmez]

My burner died and the verification was a god way for me to know. Eventually every disk i burned would fail, except iso and -RW. I RNMA the drive and all is well now, no more failures.

[Alan69]

You can pass the burn easily, and then readback is not correct. Mostly shows up on data discs though, doubt you'd even notice a small glitch in an MPG2. Note that most single byte errors only mix a few dots of video, only if it happens to be something important or several bytes etc will it glitch a frame.


Currently having a similar issue myself with this program. Long filename, and it's cutting off the last character, even though it never made any complaint about the filename being too long. So it's not writing the file correctly to the disc, last digit is off and 10 written the same. Likely a silly 1 character width error, checking for above or below the limit with the opposite test that was needed (< or >). Yet no doubt I'd have to pay to upgrade my version, even though the one I have is completely defective in a way it shouldn't be. Very annoying to have a disc write and tell you it's bad, but it's really good when checked except for Nero's screw up..

Alan

[manco]

I have been wondering about this myself. I've a new ND-2500A and I'm testing various media to be sure I'm getting good burns, so I've been using built-in verification with Recordnow DX, then I do a second error check running it through DVDInfoPro.

Is DVDInfoPro more reliable? I was wondering if it would be safe to skip the Recordnow (or Nero) verification step and only use DVDInfoPro error checking. Or should I forget DVDInfoPro and be content with Recordnow's own verfication?

[El Chupacabra]

I use the verification feature, but it adds 10 minutes to a complete movie backup, regardless of the DVDR speed (1x or 4x -- same time to verify). I haven't yet had Nero tell me the disc burned correctly, and have it then fail verification. This is what makes me question the value of spending 10 minutes more to verify a DVD after burning.

[Kingnog]

use the verification feature, but it adds 10 minutes to a complete movie backup, regardless of the DVDR speed (1x or 4x -- same time to verify).

1x or 4x is only for writing speed for dvd. 10 mins = time it takes to read the disk.

[lordsmurf]

Nope. Don't use it. It misses things that should be caught. Most of my discs pass NERO tests (on several systems), but every now and then the KPROBE or NERO-CD-DVD-SPEED tests show otherwise. Nero misses physical errors.

Or worse, it reports errors when none exist.

And it adds up to 60 minutes of time, normally 15-30.