I'm not quite sure what that means, since I can't find a "Create Data Disk" function anywhere in the Speed Tool, I assume they want me to create an actual data disk and then run the test. Is that correct?
Not exactly what your thinking but close. From the Nero cd-dvd speed tool menu click "Run Test">"Create Data Disk". It'll create a disk full of dummy files. We won't worry about that right now until we get the verification error fixed first. We can also work on getting any files off of a corrupted disk that you may want as well.
I ran the tests with a CD. The supported speeds were up to 32x, but the CD says 52x. I think this is a media problem. When burning CD's, I've noticed that Nero always writes at a slower speed than that marked on the CD
That doesn't necessarily narrow it down to a media problem though it is still a possibilty. In fact, I think it more likely the drive isn't correctly identifying the media. That is why I had you upgrade the firmware which is specificly written to address this issue. Understand that the cd you bought a month ago may not be the same cd you bought yesterday, even though it has the same label slapped on it. Brand name means nothing
. There are only a few "actual" manufacturers. These few manufacturers supply all the disks you see on the store shelves, constantly refining\changing the disc composition which can cause your burner to not identify it 100% correctly. To see what I mean, stick a cd in your drive, open the nero info tool again and click the 'disc" tab again. Under "extended Information" you will see the "actual" Manufacturer ID. If you open the cd\dvd speed tool, Click Extra>CD Info, it'll also give you the recording layer used on the disc. (i.e. Dye Type, etc.)
The speed test showed a start speed of 14.61x, an end speed of 32.88x, and an average speed of 24.44x. Now how do I translate this to DVD burning speeds?
Burn at 24x for starters. Use the drop-down arrow in Nero's interface before burning to select it.
If you get no verification errors, do another one at 32x and see what happens. On the other hand, if you still get the error at 24x, drop it down to 16x and see what happens.
The bottom line here is if burning at slower speeds resolves the verification errors, then there most likely isn't a mechanical problem with the drive itself and we can stop looking at that.
Let me know what you come up with. I also need to know which firmware version (BA or TU) you upgraded from and to.