Burned DVD's show up as blank
I have a very strange problem that I've spent hours trying to figure out now, and haven't made any progress on. Yesterday, I used 'Burn' to burn several data dvd's on an iMac. Each burn completely successfully, and was confirmed good by checking in another iMac. You can also tell the dvd's are burnt by looking at the back of them. I believe they were burnt using the HFS+ filesystem.
Today, I tried using them on my MacBook Pro running OS 10.4.11. When I insert them, they show up as Blank DVD's and are mounted as such. Using the Disk Utility to examine the disk, I recieved this information:
===========
Name : HL-DT-ST DVDRW GWA4080M
Type : Disk
Disk Identifier : disk1
Media Name : HL-DT-ST DVDRW GWA4080M Media
Media Type : DVDROM
Connection Bus : ATA
Connection Type : Internal
Connection ID : Device 0
Device Tree : /PCI0@0/PATA@1F,1/PRID@0/@0:0
Locked : Yes
Writable : No
Ejectable : Yes
Mac OS 9 Drivers Installed : No
DVDROM : Yes
Optical Media Type : DVD+RW
Device Type : CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-R, DVD-RW, DVD+R, DVD+RW
Location : Internal
Total Capacity : 0 Bytes
S.M.A.R.T. Status : Not Supported
Disk Number : 1
Partition Number : 0
==================
That looks right, except for the 'Optical Media Type' which should be DVD+R, though I may be misinterpreting what that is talking about.
Since the DVD's are showing up as blank, I tried burning something to them. They wouldn't burn.
I did get brief access to another iMac, and on that machine, one of the DVD's showed up perfectly. I'm at a loss as to what is happening here. Any ideas?
The drive will read other burned or pressed dvd's as well as cd's.
I'm nearly at my wits end here, because I really need this to work. I've been scouring google like a madman and haven't found any answers. It really gets me that the dvd's work in the iMac's, but not one this drive. This drive works well otherwise. This is one of the oddest computer problems I've encountered.
Macbook Pro, Mac OS X (10.4.10), myob