Introduction

Today, I want to examine the btrfs filesystem on Manjaro Linux. Interestingly, it appears as the default option in the installer for Manjaro 26.1 (Bian-May). I will explore how btrfs is setup in this version.

For those unfamiliar with Btrfs, it is a modern Linux filesystem that supports features such as subvolumes, snapshots, checksums, compression, RAID, and multi-device configurations. In this article, I’ll cover three main topics:

• A high-level overview of Btrfs
• Btrfs specifically on Manjaro
• How to add disks to expand an existing Btrfs filesystem

Although Btrfs supports RAID and snapshots, neither feature is a replacement for regular backups. If you already make backups, keep doing so. If you don’t, now is a good time to start.