File System Implementation

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40File System ImplementationIn this chapter, we introduce a simple file System Implementation , knownasvsfs(theVery Simple File System ). This file System is a simplifiedversion of a typical UNIXfile System and thus serves to introduce someof the basic on-disk structures, access methods, and various policies thatyou will find in many file systems file System is pure software; unlike our development of CPU andmemory virtualization, we will not be adding hardware featuresto makesome aspect of the file System work better (though we will want to pay at-tention to device characteristics to make sure the file systemworks well).

file system, built on a tiny 64-block partition, this number represents the maximum number of files we can have in our file system; however, do notethatthesamefilesystem,builtonalargerdisk,couldsimplyallocate a larger inode table and thus accommodate more files. Our file system thus far has data blocks (D), and inodes (I), but a …

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