Hi, Since a few days ago, I am having trouble erasing DVD+RW discs. When I insert a used disc and try to erase it in Disk Utility, the process seems to complete almost immediately, ending with OS X asking me if I want to mount the inserted blank disc in Finder. However, if I eject the disc and put it back in, everything is still on there. (detail: When erasing, there is usually a short interval where a striped progress bar is shown, after which a "normal" progress bar is slowly filled as the disc is erased. However, for me only the striped progress bar is shown--the "normal" progress bar is skipped--and then OS X says erasing is done.) If instead of ejecting the disc I choose to go ahead and burn something as if Disk Utility has actually erased the disc, I get a laser power calibration error. [Update:]Burning blank DVD media also does not work. I get the following error when I try to burn a disc using the Finder: Burning the disc failed because an unexpected error occurred. (Error code 0x8002006E) The drive can read DVD disks (all supported kinds), as well as erase and burn CD-R/W's. But DVD erasing and burning does not work. I have tried several different discs and 2 different brands, to no avail. I have tried this on Tiger and Leopard, both with latest software updates, with the same problem. Right now I do not know if this is a hardware or a software issue. Any help would be sincerely appreciated. I rely on my DVD+RW's to make backups. EDIT: I have a Santa Rosa MacBook Pro, using internal SuperDrive.