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+.. SPDX-License-Identifier: GPL-2.0
+
+=====
+BTRFS
+=====
+
+Btrfs is a copy on write filesystem for Linux aimed at implementing advanced
+features while focusing on fault tolerance, repair and easy administration.
+Jointly developed by several companies, licensed under the GPL and open for
+contribution from anyone.
+
+The main Btrfs features include:
+
+ * Extent based file storage (2^64 max file size)
+ * Space efficient packing of small files
+ * Space efficient indexed directories
+ * Dynamic inode allocation
+ * Writable snapshots
+ * Subvolumes (separate internal filesystem roots)
+ * Object level mirroring and striping
+ * Checksums on data and metadata (multiple algorithms available)
+ * Compression
+ * Integrated multiple device support, with several raid algorithms
+ * Offline filesystem check
+ * Efficient incremental backup and FS mirroring
+ * Online filesystem defragmentation
+
+For more information please refer to the wiki
+
+ https://btrfs.wiki.kernel.org
+
+that maintains information about administration tasks, frequently asked
+questions, use cases, mount options, comprehensible changelogs, features,
+manual pages, source code repositories, contacts etc.