Installation notes to install Arch Linux on Lenovo T480
Btrfs (B-tree file system) is a modern, copy-on-write (CoW) filesystem for Linux designed for high scalability, fault tolerance, and easy administration. It supports advanced features like snapshots, data compression, and built-in RAID. It is widely used in Linux distributions (e.g., Fedora) and enterprise NAS systems for data integrity.
zram: Zram (formerly compcache) is a Linux kernel module that creates a compressed, RAM-based block device, acting as a faster alternative to traditional swap. By compressing data in memory (typically at a 3:1 ratio), it allows systems to store more data in RAM, significantly reducing disk I/O and enhancing responsiveness on low-memory devices.