The last two days i have been searching all over the web, so as to find a solution to my problem. Ofcourse, I have checked previous threads in cdfreaks.
Well, the problem is that my Nec 4550 cant read the majority of DVD-R disks i have. However it can perfectly read every DVD+R, DVD+R DL, DVD+RW and CD/CD-RW. 4550 is an excellent writer btw. I had never had any problem with its writing features.
The only DVD-R that 4550 can read is a TDK, (media code : TTH01) with ISO9660 File System. It fails reading Taiyo Yuden (TYG02) and other "high quality" media.
To make things worse, I should admit, that the problem is in reading DATA DVD-R. It reads DVD-Video disks fine, even though they are DVD-R. There is no problem at all with DVD-Video.
I also have the Nec 3520 and the Nec/Optiarc 7173. They are reading/writing fine.
Nec 4550 is Primary Master in my pc. There is no device in primary slave. It is under Ultra-DMA 2/Ultra 33. My chipset is Nvidia's NForce 4. I am using Windows XP Pro SP2 32bit. I am burning disks with the latest Nero. I have flashed 4550 with the latest original firmware, and (ofc) I have used Liggy's and Dee's firmwares in the past (they are awesome). I also have tried latest ASPI drivers. I have disabled Imapi CD-Burning Com Service.I dont have any application like Clone CD/Alcohol or Daemon Tools. There are no Virtual Image Drives.
When i place a DVD-R (data) in my 4550 it cannot be read, and the device's name changes from DVD-RAM drive to CD-Rom Drive. When i click it to browse its contents i get the classic windows error, corrupted disk or unsupported format, blah blah blah.
I look forward to hearing from you guys. Thank you in advance.
Excuse me for my bad English , I am not a native speaker.