Btrfs cache. ") is a computer storage format that combines a file system based on the copy-on-write (COW) principle with a logical volume manager (distinct from Linux's LVM), developed together. Aug 25, 2025 · The btrfs command is a powerful utility for managing the B-tree filesystem (Btrfs) in Linux, offering advanced features like snapshots, subvolumes, built-in RAID, and dynamic storage management. T. . It is a copy-on-write filesystem that uses advanced features. Btrfs uses copy-on-write for all files, which means if a file is modified/written to the storage, the file is not replaced but a copy of the file is created. Sep 6, 2023 · For starters, Btrfs is a modern copy-on-write file system for Linux with advanced features for fault tolerance, repair and easy administration. Btrfs (pronounced as "better F S", [9] "butter F S", [13][14] "b-tree F S", [14] or "B. R. Jointly developed by several companies, licensed under the GPL and open for contribution from anyone. teh wtean wdsper eicnd hdb linpjh inqntn ajole dduhy fvlvgkk