img burn verify

[mike487]

just a question to ask if anyone else has had this problem.i use img burn as my main burn engine for dvd.never had a problem verifying any disc with this progam until I bought some sony blanks I have burned about 65 movies on these sony blanks thay are sony D11.imgburn will not complete the verify on any of these discs all 65 stop at exacty 85% done and fail.but I can use nero cd/dvd speed to verfiy and it will complete.and the burned movie plays fine on set top player and will rerip with dvd decrypter and dvd shrink.I have not tried the new imgburn 2.0 yet. this happened on the vrsion before the 2.0 upgrade but i am still expection to have the same problem since nothing was mentioned in the upgrade about verfiy problems.I am burning these discs on a NEC 1100a drive and trying to verify on the same drive but I have also tried to verify the disc on my lite-on dvd rom drive and same thing happens.anybody know why this might happen?or had this happen to them before?

[guns1inger]

I have yet to find a verify function in any burning program that doesn't produce more failures on clean discs than true failures. They are all, without exception, a waste of time. Stick with Nero CD/DVD Speed's read test (I use DVD Info Pro, but the function is the same) as it is as good test as any.

I have just burned a simple ISO (only a few files) onto CD with the new imgburn 2, and had left verify ticked by mistake. It failed at 38%. Yet every one of the files could be read, opened, copied and manipulated.

Verify - bah humbug and bollocks.

[VegasBud]

mike487,

If your burns were verifying fine until you changed to these disks, and now they don't verify, it indicates the disks aren't burning right. That notion is reinforced by the failure at 85%. Poor media becomes less reliable as it approaches the outer edge.

Nero cd/dvd speed only checks the readability of the disk sectors, not the contents of the sectors. Verify is needed because it will alert you if even one bit of one byte is different from the source. Since you want the burned disk to exactly represent what's in the source (on your hard drive), you should really use the verify.

guns1inger is correct, at least as far as the Nero verify. Independently verifying what Nero reports (over several years) indicates a 1% error rate (at least in my experience). It can go either way, missing real errors, or reporting errors that don't really exist. On the other hand, my experience with DvdDecrypter/ImgBurn is a 0% error rate.

Consequently, if ImgBurn is failing to verify, it would be a good idea to go back to whatever kind of disks you were using that did verify.

If you would like verify the ImgBurn Verify results, get a file/directory compare program, and use it to compare the source with the burned disk. Google should be able to help you find a freeware compare program. If possible, you want one that allows you to set the retries to zero.

[LIGHTNING UK!]

The verify function is only as good as your drive / media.

It will only fail when the drive errors out (or there is a 'miscompare' in the data).

A drive error that then suddenly goes away the next time you read the disc only goes to prove your drive is unreliable with the media you're using.

Being a verify function, there are no 'retries' performed as that wouldn't give you a true indication of any problems.

You may well find a failed read will succeed on the 2nd or 3rd attempt. I expect the OS performs a number of retries automatically, therefore shielding you from the truth.

I'd actually like to know what on earth you think a 'read test' is in cdspeed?! It's doing EXACTLY the same thing ImgBurn does.... reading the all the sectors from start to finish.
ImgBurn has the added benefit of being able to compare the data returned by the drive to the data in the image file - so really you're getting two levels of security.