Long description

A rectangular block with one horizontal partition. In the first partition, there are two circles labeled User Process. In the second partition, there is a horizontal ellipse labeled Virtual file system. User process points to the virtual file system and is labeled POSIX. A virtual file system with three forward arrows labeled VFS interface points to three small ellipses labeled FS1, FS2, and FS3, and these are labeled File system. From the file system, there are three bidirectional arrows that point to the Buffer Cache block.