I have a CD-R which shows significantly more space USED than I can find in files & directories. This is an Imation 12x 80Min CD-R (700 MB/ 80 MIN).

From Ubuntu Linux desktop, properties show:
    645 items totaling 211.7 MB
    283.6 MB used
    isofs

From the Linux commandline:
    df shows 290,418k blocks available and used
    du shows 212M; adding up the subdirectory sizes gets 217


From Win Vista desktop, the CD properties show:
    302 MB used
    347 MB free
    649 MB capacity

The CD contains a single DIRECTORY/folder with one later of sub-directories/-folders. Win Vista Properties on that top directory shows:
    622 files 22 folders
    211 MB size
    212 MB size on disk


The CD was "burned" on a PC and drive I no longer have.

I wrote "04/1999 - 01/2001" on the disk, but the contents are only from mid-2000 on. Unfortunately, the missing piece is pictures from just before my daughter's birth thru her first birthday. My wife recently was putting together electronic albums from all of the CDs and discovered this "gap".

The amount of "missing" data (~60 MB BASED on the Linux results; ~80 if you believe Windows instead) LEADS me to wonder if I've lost a session. Assuming the 20M initial session overhead is already accounted for in the 700 MB, the 13 MB for a second session could still result in >40 MB of potential pictures.

I have had no luck identifying any means of digging into the disk and am hoping that someone will be able to point me to more information, if not a solution.

Thanks!USE ISOBuster and extract all the data to a HDD directory and see if the missing files are there...it could be an unfinished session...
There is a FREE version but you have to hunt for it.,