CD-RW and DVD+/-RW

Thanks for the reply.

I have been able to erase a CD-RW using Disk Utility. On a Windows machine a CD-RW or DVD-RW acts like a large floppy disk. I can add/overwrite/delete files and directories. Additionally, I can reformat the media.

Sy Bensky

Thanks again for the response.

I am familiar with Multisession recording. However that is not the point of my post.

I have purchased and used succesfully on a Windows PC, CD-RW, DVD-RW and DVD+RW media.

The System Profiler on my Mac states the following under "Disk Burning:"

HL-DT-ST DVD-RW GWA-4165B:

Firmware Revision: C006
Interconnect: ATAPI
Burn Support: Yes (Apple Shipped/Supported)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -RW, +R, +RW, +R DL
Burn Underrun Protection CD: Yes
Burn Underrun Protection DVD: Yes
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: No

If I insert a blank RW media, I can erase it with Disk Utility. Afterwards, the computer will not recognize the media. If I insert an RW disk that was formatted and written to on a Windows computer, I can read the data on the disk but cannot write to the disk. If I insert a blank RW media that was formatted on a widows machine, Didk Utility indicates that it is "read only."

The online Apple Spec for the computer states the following:

Optical drive 16x SuperDrive with double-layer support (DVD+R DL/DVD±RW/CD-RW)

Thanks again,

Sy Bensky


PowerMac G5 Quad Mac OS X (10.4.3) 1 GB memory

Hi,

The CD-RWs are Imation brand rated at 10x. The DVD-RWs are Memorex brand rated at 1x-2x (on the box). The DVD+RWs are Memorex brand, however, there is no speed rating on the package. Only 4.7GB / 120 minute.

Sy Bensky

On the selected action I have been selecting "Ignore."

I guess that since OS X does not support packet writing, my efforts in trying to use RW media are futile, unless there is a third-part solution.

Sy Bensky

I tried your suggestion. I selected "Open in Finder." I copied a file - html text - to the disk. It appears to have copied ok, the icon appears on the CD window. If I try to open the .html dfile with either Text Edit or Firefox, the document is blank (no text). If Itry to drag the file to the trash, I get a message telling me that I do not have sufficient privileges - File Info indictaes that i have read/write privileges on the file.

If I try to add another file, I get a message sating that th CD cannot be modified.

I Googled for DVD Write PRO. It is an OS 9 application.

Thanks again,

Sy Bensky

I guess that the problem is that OS X does not support "packet writing."

Until packet writing is included in OS X or a third part solution is available, I'll just have to use CD-R and DVD+/-R.

Thanks to all those who responded.

Sy Bensky