DiskTuna vs e4defrag

DiskTuna’s JPEG-Repair Toolkit combines JPEG-Repair for damaged photos with JpegDigger for recovering lost images. It runs on Windows 7, 8, 10, and 11 and processes files locally on the PC, without uploading them to remote servers. JPEG-Repair addresses corrupt headers, invalid markers, bad-sector damage, and JPEG bitstream errors with visual feedback. It can recover JPEG data from corrupt RAW photos such as Canon CR2 and Nikon NEF files, and does not re-encode JPEG images. The demo shows low-resolution previews; the full version enables high-quality saves. Repairing a corrupt JPEG header requires a reference photo made with the same camera and settings. The toolkit specializes in JPEG and specified RAW formats and does not repair PNG files. The listed plan includes both tools and is billed at €29.00–€49.00, excluding applicable taxes. Downloads are unsigned and may trigger Windows SmartScreen warnings, including after updates. The maker offers a refund only when the demo works on the files but the full version fails on those same files.

e4defrag is a Linux utility for defragmenting extent-based files on ext4 filesystems. It accepts an individual file, a directory and its files, or a device mounted as ext4. The utility aims to place targeted data in more contiguous blocks, which the manual says can improve file access speed. Its -c option reports current and ideal fragmentation counts and a fragmentation score without making changes; the score appears only when the check runs as root. With -v, it prints error messages and each file’s fragmentation count before and after defragmentation. e4defrag checks for ext4 and reports an error for other filesystem types. It does not support swap files, files in lost+found, or files allocated in indirect blocks. A target device or mount point excludes files belonging to another device’s mount point, and fragmented or insufficient free space can prevent improvement. The manual says it is safe to run while another application uses a file, though shared memory and disk bandwidth can slow both. It is free at free.