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Consider the following scenario:
Boot a system with Windows 7
Insert a DVD+RW (or DVD-RAM) disk that has some amount of data recorded on it
Check the capacity of the disk in "My Computer" (Windows Explorer)
Result: Windows will report the entire capacity of the disk (e.g., 4.37GB) as "free" even though there's data on the disk
NOTE: The disk is fully functional (users can open files off the disk, run executables, etc.) and still has the data on it despite Windows 7 showing all of the disk space as "free".
NOTE: This condition occurs even when data is recorded to the disk in "Mastering mode".
Thisisaknownproblem in Windows 7 that is under investigation for future Windows releases.
To find out the capacity of space left on DVD+RW (or DVD-RAM) disk, place the disc into a Windows Vista DVD+RW drive and look in "My Computer".