6.1. Disc recognition
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Open CDRoller and insert the disk into the drive. The program must analyse your disc immediately after insertion. After the disk has been verified, the Main Window displayes it similar to the one shown here.
Look at the File System column. This may give us an important info about the type of the disk. In the picture shown above, this is a disk in which UDF file system has been placed onto a single session. We will name the disk has one or more such sessions as "UDF disk". If all sessions are displayed with "ISO/Joliet" in the File System column, we will name such disk as "ISO disk", i.e the disk with ISO 9660 file system.
At first, click the Recover All button in the Toolbar in order to retrieve all files and folders off the disc or selected (current) session. Also, check out a readability of the root directory (folder), just left double click on the disk name, or use the Open command from the Side Bar. Please answer to the following questions: Is the root folder readable or not? Can i browse the disk contents? The answers may be applicable at the next stages of cd/dvd data recovery.
1. If the program can not recognize your disk automatically, click the Refresh button in the Tool Bar, or insert the disk first and then open CDRoller. Also, to read the unclosed disks, i.e the disks left "as-is" by CD/DVD/BD mastering program we recommend you to use the following method:
2. To read UDF disks we recommend you to use CD-RW (DVD-) drives - the disks are recorded with so-called packet-written technology and old CD-ROM / DVD-ROM drives may not access to their data.
3. Some drives may not support our special methods. These devices may hang the program when analyzing the disk. In this case, uncheck Always use a drive capabilities under the Browser tab in the Preferences dialog, insert the disk and try to recognize it again.
4. If you get 'Unknown file system...' message and you're sure the files data were placed on the disc, please try to scan your disc without using the file system structures:
- If your DVD has been created by DVD camcorder or standalone recorder, please use the Recover DVD Video option.
- If you know ISO/Joliet file system was actually placed on the disc, try the Identify Raw ISO Data command.
- In case of UDF disc, if you know a name of CD/DVD/BD mastering program (or standalone device), which actually created your disc, try the forced scan, selecting the software or device profile in the forced scan list under the UDF Reader tab in the Preferences dialog.