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sitania - Operating Systems CS-384 File Systems NTFS and...

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Operating SystemsCS-384File SystemsNTFS and FAT32Submitted To: Dr. Chris TaylorSubmitted By: Aditya SitaniDate: 02/3/2003
Table of ContentsIntroduction.....................................................................................................0 Physical Disk...................................................................................................1 Files.................................................................................................................2 Files concept....................................................................................................................2 File Attributes..................................................................................................................2 File Operation..................................................................................................................4 FAT32.............................................................................................................5 Origin Of FAT32.............................................................................................................5 Disk Structure..................................................................................................................6 FAT Naming convention.................................................................................................7 Advantages of FAT32.....................................................................................................8 Disadvantages of FAT32.................................................................................................9 NTFS File System...........................................................................................9 NTFS Disk Structure.....................................................................................................11Partition Boot Sector.....................................................................................................11 Master File Table (MFT)...............................................................................................12Metadata........................................................................................................................15Features of NTFS..........................................................................................................16NTFS multiple data streams......................................................................................16NTFS Compressed Files...........................................................................................16NTFS Security and Encryption.................................................................................17
1NTFS Sparse File......................................................................................................17Hard Links.................................................................................................................18FAT32 vs. NTFS...........................................................................................18Conclusion.....................................................................................................19References.....................................................................................................21Tables and FiguresFigures:Fig: 1 Hard Disk Structure..............................................................................2 Fig: 2 The FAT file Structure.........................................................................7 Fig: 3 Layout of an NTFS volume................................................................11Fig: 4 Master file table..................................................................................13Fig 5: Sparse File..........................................................................................18Tables:Table 1: NTFS File Attributes......................................................................15Table 2: Meta Data Table..............................................................................16Table 3: Comparison between FAT32 and NTFS........................................19
IntroductionThe world is revolving around computers and almost all the work in today’s world is dependent on computers. An operating system is a program that acts as an intermediary between a computer user and the computer hardware. Just imagine how crazy a user would go if the computer would not be able to store data permanently, and all the data would get erased as soon as the system was rebooted or there was a power failure. Permanent data is stored on secondary storage devices like fixed disks, floppy disks, magnetic tapes and other types of storage devices. The file system management resides permanently on a secondary device. In an operating system, the file system manages the information that resides on the secondary storage device. A file system is the organization method of data on a hard disk volume. It consists of two distinct parts: collection of files, each storing related data, and a directory structure, which organizes and provides information about all the files in the system. Some file systems have a third part, partitions, which are used to separate physically or logically large collection of directories. The two most popular file systems used today are FAT32 (File Allocation Table ) and NTFS ( New Technology File System). Both the file systems have their own advantages and disadvantages. This report will discuss about these two different file systems and their working. To understand the concept of file systems, one should have a basic idea about physical disks.
1Physical DiskA hard disk uses round, flat disks called platters, coated on both sides with a special media material designed to store information in the form of magnetic patterns. These platters are mounted by cutting a hole in the center and stacking them onto a spindle. The platters rotate at a high speed, driven by a special spindle motor connected to the spindle. Special electromagnetic read/write devices called heads are mounted onto the platters and used to either record information onto the disk or read information from it. The sliders are mounted onto arms, all of which are mechanically connected into a

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