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The Linux command line - William Shorts
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btrfs
From btrfs docs
BTRFS is a modern copy on write (COW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration. Its main features and benefits are:
- Snapshots which do not make a full copy of the files
- Built-in volume management, support for software-based RAID 0, RAID 1, RAID 10 and others
- Self-healing - checksums for data and metadata, automatic detection of silent data corruptions
- Data compression
- Reflinks, fast and efficient file copies