FFS2

FFS2, or Fast File System 2, is a variant of the Amiga Fast File System developed as an enhanced successor intended to improve performance and reliability on larger storage devices while remaining compatible with the original FFS layout. It emerged within the Amiga community as an evolution of FFS, incorporating changes to metadata handling and block allocation to reduce fragmentation and speed up directory and file operations. The design aimed to extend disk size support and provide more robust behavior on the evolving hardware of its time.

Technical improvements commonly associated with FFS2 include more efficient allocation strategies, improved handling of free space, and refinements to metadata structures to aid crash recovery and volume checks. These changes sought to deliver better scalability on larger volumes without requiring a complete rewrite of the FFS on-disk format. While not a complete redesign, FFS2 represented an incremental advance intended to address practical limits observed with the original FFS.

Usage and legacy: FFS2 appeared in some AmigaOS releases and third-party extensions as an optional driver or module. It did not achieve the same widespread adoption as other Amiga file systems, and modern AmigaOS configurations more commonly rely on alternatives such as SFS (Smart File System) or PFS variants for performance-critical setups. Today, FFS2 is largely of historical interest, with legacy systems sometimes retaining FFS or its successors for compatibility.

Related file systems include the original FFS, Smart File System (SFS), and various PFS variants used in AmigaOS environments.