Verify disc with nero cd-dvd speed or dvdinfopro

[arnie.d]

Hi,

I used nero cd-dvd speed and dvdinfopro to do read tests of burned dvd+rs (dl). If the read test is OK can I assume the disc is fine or don't these programmes "see" every error?

[LIGHTNING UK!]

They see physical read errors but you really need to be verifying the disc against the image (or files) you created it from.

I believe dvdinfopro has the option to compare against a folder and maybe even an image. Not sure about cdspeed.

All I'm really saying is that a simple 'read' test isn't 100% reliable.

[arnie.d]

I presume using ImgBurn to compare the disc with the ISO is a good method?

Also if I can copy a dvd back to the hdd without problems (rereads etc) it should be errorfree, right?

[LIGHTNING UK!]

Yes that is a good method - I just didn't want to plug my own tool ;)

Again, reading back is one thing. It means your drive can read the disc ok. It doesn't mean the content is exactly what it should be. Either way, I'm sure it would be fine.

[laserfan]

FWIW in addition to having the burner do a "compare/verify" against the original, I additionally use Scan Disc in CD-DVD Speed in a different DVD-ROM player, and also pop the disc into a DVD stb for final good measure.

Overkill no doubt, but it's easy enough to do! ;)

[arnie.d]

Yes that is a good method - I just didn't want to plug my own tool ;)

Wow! I never noticed you are the creator of ImgBurn! :eek:
I'm only using it since a few days but I like it very much.

Laserfan, I love overkill. I want to make sure it's good.

[setarip_old]

@arnie.d

I'd suggest that the true test of the burned DVD is simply whether it plays properly on the player you intend to use...

[blutach]

Playing correctly is not always a true test. First, you'd need to play every sector and many DVDs don't do that (eg selecting a language from a language selection menu would eliminate many cells in the menus and many sectors in the title VOBs ever being accessed, all of which could contain bad sectors).

Furthermore, a bad sector or two may not be noticed - just a pop in the audio or a flicker in the vid. That does not make the disk perfect.

But a verify against an MD5 sure gives you peace of mind.

Regards

[setarip_old]

Playing correctly is not always a true test.Since the purpose of making a DVD is to play it, playing it to se that it plays properly is, as far as I'm concerned, the one test that counts ;>}

[r0lZ]

Anyway, even if you test your copy carefully on several players and with several methods, that doesn't mean for sure that the backup is really reliable.
Cheap media have the habit of losing their content after a very short time. Some kind of auto-destruction mechanism! Even a perfect copy can be completely unreadable some month later. It's why buying cheap media is never a good choice.

[laserfan]

Cheap media have the habit of losing their content after a very short time.Yes, I was quite amazed to find a DVD-R I'd made just a few years ago is no longer even recognized by any of my players! :scared:

I don't know that it was "cheap media" either. The lesson to be learned is: for anything that is irreplaceable, e.g. home movies or photos or data or what-floats-your-boat you had better have multiple copies of it somewhere!

Another thing I do sometimes, with data anyway, is when I burn a backup I put-in extra copies until the disc is full--better chance that if a file becomes unreadable for any reason, you might find it elsewhere on the disc.