Btrfsmaintenance vs Defraginator

Btrfsmaintenance is a free set of scripts for automating maintenance on Btrfs filesystems. It can run scrub, balance, trim, and defragmentation, with separate settings to enable, disable, and configure each task. Scrub reads filesystem data and metadata to check checksums, which can reveal hardware problems or bit rot; when a good redundant copy exists, it can repair data automatically. Periodic jobs can be scheduled with cron or systemd timers, though only one scheduling method can be active on a system. The project supports widely used distributions, provides installation guidance for Debian-based systems, and describes manual installation for others. On SUSE-based distributions, a zypper plugin can defragment RPM database files after package installation. Settings are designed for a default installation with Btrfs on the root filesystem and can be changed in the sysconfig file. Scrub may create intense read activity, and balance can use substantial read and write resources; task concurrency can be serialized to manage impact. Directory defragmentation does not descend into other mount points, nested subvolumes, or snapshots, which need separate paths listed. It is licensed under GPL-2.0 and available for Linux and self-hosted use.

Defraginator is a desktop utility for making selected ROM and firmware `.bin` images contiguous on removable storage. It detects mounted volumes that appear to be removable, scans them recursively, and checks matching files’ physical layout. You can enable or disable target sizes of 256 KB, 512 KB, 1024 KB, and 2048 KB; files outside those sizes are not in scope. The app needs a single free gap at least as large as the file. It reports available free space and, on Windows, the largest contiguous block; on Linux and macOS, that largest-block figure is unknown. Windows moves clusters in place and requires administrator rights. Linux and macOS rewrite files into newly allocated space and check their physical extents; the Linux FIBMAP fallback requires root, while the listed macOS operations run as a normal user. The project says it restores the original after an unsuccessful rewrite and reports success only after verifying contiguity. Keep the card connected during work. Defraginator is free and GPL-3.0 licensed; building it requires the .NET 10 SDK.