Let me elaborate, generally once you record a file on optical media it will exist there until you reformat the disk (if you're using recordable optical media). The Live File System allows you to delete, write and change files without having to reformat the media every time. This is very similar to your hard drive, USB drive, or any other type of digital storage.
Note: To use this technology you need a CD-RW or DVD-RW recordable disks, and burner that supports reading and writing this media. This feature will not work on CD-R or DVD-R disks.
By default, Vista will want to format the you optical media using the Live File System. Although there is a down side to this format, it's only readable by Windows Vista and XP.
When you eject the disk when you're doing using it, it might take a short time for it to eject. This is because the OS has close the session on the disk it will be unreadable when you try to use it again.
Formating new media with the Live File System
- Put a blank disc in the optical drive.
- Wait for the AutoPlay dialog to display.
- Select 'Burn files to disc'.
- Change the disk name then press the Next button.