Known Issues and Other Limitations

Data Recovery

Data recovery can only be performed to another disk (partition), the target disk must be supported by the OS (e.g., in DOS/Win9x/ME you can recover data to a FAT formatted disk only)
DOS, Win9x/ME: unicode symbols in file names outside the selected code page are replaced with underscores ("_") or transliterated according to the loaded translit tables
DOS, Win9x/ME or FAT: files larger than 4GB can only be recovered with splitting in parts due to the FAT limitation
File hard links are recovered as different files
NTFS alternate data streams for directories can be recovered only after FS reconstruction
NTFS encrypted file maximum size: 4GB
NTFS permissions and owners are not supported
Maximum name length supported: 255 characters
Symbolic links, special attributes, other FS-specific options are not supported
Win9x/ME: drives greater then 128GB are not handled correctly without special patches applied to Windows drivers
Maximum path length supported: 259 characters for DOS, 4096 for Windows, Linux, macOS
Maximum path length supported by DOS: 79 or 127 characters (for DOS-names) depending on DOS version.
Subdirectory depth is up to 1024 (can be increased using maxrecoverdepth= parameter)
If name substitution is used under DOS then name handling (such as auto renaming) is not supported

Journal is not supported
SECURITY INFORMATION is not supported on creation (to access files and directories it is necessary to set permissions using OS features)
OBJECTID is not supported
Additional creation of DOS-compatible names is not supported
Compressed files are not supported
Alternate data streams are not supported
To allocate/append a file a contiguous free space is required

the software may work within the available RAM. 32-bit versions may use up to 3GB of RAM only (up to ~10 million files/streams and 2 million directories); DOS may access even less memory
up to 134 million directories and 1.7 billion items per directory can be handled in 64-bit versions (within available RAM blocks)
no additional support for virtual disk image files in DOS
NTFS alternate data streams for a file are displayed only in a single directory (no matter the file may be hard linked to multiple directories)
up to 2K windows/panels/objects for GUI version, or width-limited for console
up to 2K items in the list of Devices
up to 16K custom data rotation items (striping) when constructing Custom RAID
up to 2K visible items per section for Full Scan (showvolumesnum= parameter)
up to 16 million MFT fragments of NTFS for Full Scan (ntfsmaxmftruns= parameter)
maximum search depth for File Panel Search is up to 1K directories
keyboard and mouse input is limited in Linux (keyboard shortcuts and national input may not be supported)