I recently purchased an LG GH22NP20 rewriter and installed it in my Windows XP machine, as secondary master, 80 wire cable, Ultra DMA4. Drive is recognised OK in BIOS and by Windows.
Using Nero, I burned a Verbatim DVD-R, and it failed to verify saying “Cannot mount disk” or something like that. Windows and Nero simply won’t read the disk…
So I burned a few more of the same type. None of them would read in the LG, yet they read perfectly in a normal domestic DVD player, so it seems to be burning ok.
Thinking I’d got a bad batch of DVD-R’s, I tried some Memorex DVD+R, with the same results.
With Sony DVD-RW’s it would sometimes read, but most of the time it wouldn’t.
It wouldn’t read any branded DVD-R’s recorded by other people either. The only DVD’s it will play are a few unbranded ones and commercially produced things like install disks (are these DVD-ROM?)
It read and wrote CD-R’s at up to 52x with no problems at all.
In the end I gave up, and to try and prove whether or not the drive was faulty, I bought another identical model from PcWorld. At first, this one was able to burn and read all the discs, but after burning a dozen CD’s, this one has also stopped reading DVD’s. It still works OK with CD’s.
If I stick a previously recorded DVD-R in the drive, windows shows it as “CD Drive (D” alongside a disc icon with “DVD-R” underneath. Clicking on the icon elicits the error dialog “D: is not accessible, Incorrect function”.