Linux File system different from file systems of other operatiing system

• VFS
 
• The interaction between the VFS and specific filesystem types occurs through two main data structures, the super_block structure and the inode structure, and their associated data structures, including super_operations, inode_operations, file_operations
• Therefore, the role of a specific filesystem code is to provide a superblock for each filesystem mounted and a unique inode for each file on the filesystem, and to provide code to carry out actions specific to filesystems and files that are requested by system calls and sorted out by the VFS.
• Block groups

• Buffer cache (which was described in Section 4.3)