File Management System

An interface for operating system for storing and organizing data on the storage device and make it easy to find and access them​ and it is used to

• Stores user’s data​
• Retrieves user’s data​
• Hierarchical presentation​
• Controls access, permissions​

Different type of FS​

Media​

• Disk​
  • ext2, ext3 (Linux)​
  • ufs (Unix)​
  • FAT, NTFS (Windows)​
• Optical​
  • CDROM FS (also ISO)​
• Memory​
  • tmpfs​
• Tape​
  • tar​

Network ​

• NFS (Unix)​
• CIFS (Windows)​

Special​

• procfs – /proc​
• sysfs   – /sys​

How is it used?​

• Create the FS​
  • mkfs​
  • device, size, options​
• Mount the FS​
  • mount​
  • FS device, mount point, options​
• Use the FS​
  • create, open, read, write, close, delete​
  • truncate, append, move, rename​
  • owner, group, permissions, ACL​
  • extended attributes​
• Unmount the FS​

Advantages

Advantages of FS​

• Hides media dependency, direct media access​
• Hides space allocations, usage, freeing​
• Multiple users can share storage efficiently​
• Simultaneous usage of storage