Unix File System

The UFS also called the Berkeley Fast File System (BSD Fast File System or FFS) is a file system used by many Unix and Unix-like operating systems. Vendors of some proprietary Unix systems, such as SunOS / Solaris, System V Release 4, HP-UX, and Tru64 UNIX, and open Unix derived systems like illumos, have adopted UFS.

Linux includes a UFS implementation for binary compatibility at the read level, but Linux does not have full support for writing to UFS.

Major features:

  • Capacity - 8 ZiB (273 bytes)
  • Boot blocks
  • Superblocks
  • Cylinder groups
  • inodes
  • Data blocks
  • Block-level fragmentation