When “No file system” is selected in Recover file system type box (see Part III, 2.2.1. General scan parameters setting), pure IntelliRAW™ scan operation is available only. The software will scan the partition for lost files focusing on file type identifiers.
Pure IntelliRAW™ scan dialog contains Scan free space only and Assume deleted files are fragmented optional tasks for more detailed file search. With Scan free space only task the software will scan free partition space and find deleted files data to recover files. Assume deleted files are fragmented allows the software to gather file fragments for more correct reconstruction. These two tasks are enabled in cases when the software identifies file system. If the file system is not identified these operations are replaced with Scan entire space task. You should add IntelliRAW™ rules count to start recovery.