11.File_System - File-System Implementation Mehdi Kargahi...

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File-System Implementation Mehdi Kargahi School of ECE University of Tehran Spring 2008
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M. Kargahi (School of ECE) File-System Structure s To improve I/O efficiency: Unit of transfer between memory and disk is block s Each block has one or more sectors s Sector size varies from 32 bytes to 4KB, but normally 512 bytes
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M. Kargahi (School of ECE) Layered File-System s I/O control: device drivers and interrupt handlers s Basic file-system: reads and writes physical blocks on the disk s File-organization module: s Translates logical block addresses to physical block addresses s Tracks un-allocated blocks and provides these blocks to the file organization module s Logical file-system: manages metadata information, directory structure, maintains file- structure via file control-block (FCB) (ownership, permissions, location of the file contents …) s Different file-systems: FAT, FAT32, NTFS, UFS, DVD file system, …
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M. Kargahi (School of ECE) File-System Implementation s A boot control block (per volume)
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This note was uploaded on 11/21/2010 for the course COMPUTER S 001 taught by Professor Kargahi during the Spring '10 term at Amirkabir University of Technology.

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11.File_System - File-System Implementation Mehdi Kargahi...

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