Playstation File System

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Playstation File System (PFS) is the filesystem used by the Playstation 2. It is a custom filesystem which sits on top of the Aligned Partition Allocation partition system. PFS is a 64-bit journaling filesystem, with similar characteristics to *nix filesystems such as EXT2. The maximum possible size of the filesystem is technically 2TB. The maximum file size is also 2TB. While PFS is a 64-bit filesystem, the unit of a single read/write/seek operation is only 32 bits.