CHAPTER 11: File-System Interface (PART1)

CHAPTER 11: File-System Interface (PART1)

1. File Concept

   • Contiguous logical address space
   • Types:
     • Data
       • numeric
       • character
       • binary
     • Program
   • Contents defined by file’s creator
     • Many types
       • Consider text file, source file, executable file

2. Access Methods

   • Sequential Access
   • Direct Access
   • n = relative block number

3. Disk and Directory Structure

   • Directory Structure
   • Disk Structure
     • Disk can be subdivided into partitions
     • Disks or partitions can be RAID protected against failure
     • Disk or partition can be used raw – without a file system, or formatted with a file system
     • Partitions also known as minidisks, slices
     • Entity containing file system known as a volume
     • Each volume containing file system also tracks that file system’s info in device directory or volume table of contents
     • As well as general-purpose file systems there are many special-purpose file systems, frequently all within the same operating system or computer

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