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Harleen Johal
Harleen Johal

These r d note of handling operating system Topic: File System

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FILE SYSTEMS
File Systems ,[object Object],[object Object],[object Object],[object Object],[object Object]
File system ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
File Attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
protection : permissions, access control information • UNIX utilizes permission string: chmod 644 foo.txt 􀃆 -rw-r--r— owner & group: chown, chgrp • Windows utilizes file properties/attributes: NoAccess, List, Read, Read & Add, … Location & Size Accounting Information
e.g. MS-DOS filename ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Full Path ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
File Names continued ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Folder Names ,[object Object],[object Object]
File Operations ,[object Object],[object Object],[object Object],[object Object],[object Object]
the OS must maintain information about all open files ,[object Object],[object Object],[object Object],[object Object]
File Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
access methods: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
FAT??? ,[object Object],[object Object],[object Object],[object Object],[object Object]
File Systems ,[object Object],[object Object],[object Object]
Contd.. ,[object Object],[object Object],[object Object],[object Object]
Advantages of FAT File System ,[object Object],[object Object]
Disadvantage of FAT File System ,[object Object],[object Object],[object Object],[object Object]
NTFS ,[object Object],[object Object],[object Object],[object Object]
Contd.. ,[object Object],[object Object],[object Object],[object Object]
[object Object]
Advantages of NTFS ,[object Object],[object Object],[object Object]
[object Object]
Disadvantages of NTFS ,[object Object],[object Object],[object Object]
File Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Tracks Sectors within a Track Cluster
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Clusters?
DRIVE SIZE FAT 16 Cluster Size FAT 32 Cluster Size NTFS Cluster Size 260 to 511 MB 8 KB Not Supported 512 bytes 512 to 1023 MB 16 KB 4 KB 1KB 1024 MB to 2 GB 32 KB 4 KB 2 KB 2 to 4 GB 64 KB 4 KB 4 KB 4 to 8 GB Not Supported 4 KB 4 KB 8 to 16 GB Not Supported 8 KB 4 KB 16 to 32 GB Not Supported 16 KB 4 KB >32 GB (up to 2 TB) Not Supported 32 KB 4 KB
OS and File System Compatibility Operating System FAT16 FAT32 NTFS Windows XP    Windows 2000    Windows NT   Windows 95, 98, ME   Windows 95  MS-DOS 
What happens during the Formatting Process? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Formatting Process, cont. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Formatting Process, cont. ,[object Object]
Registered Files ,[object Object],[object Object],[object Object]
Compare FAT and NTFS File System ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object]
Ext3 third extended file system ,[object Object],[object Object],[object Object],[object Object]
Advantages ,[object Object],[object Object],[object Object],[object Object],[object Object]
Size limits Block size Max file size Max filesystem size 1 KB 16 GB 2 TB 2 KB 256 GB 8 TB 4 KB 2 TB 16 TB 8 KB 2 TB 32 TB
Journaling levels ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
Thanks!!!!!!!!!!

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File system

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  • 5.
  • 6. protection : permissions, access control information • UNIX utilizes permission string: chmod 644 foo.txt 􀃆 -rw-r--r— owner & group: chown, chgrp • Windows utilizes file properties/attributes: NoAccess, List, Read, Read & Add, … Location & Size Accounting Information
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  • 27. Tracks Sectors within a Track Cluster
  • 28.
  • 29. DRIVE SIZE FAT 16 Cluster Size FAT 32 Cluster Size NTFS Cluster Size 260 to 511 MB 8 KB Not Supported 512 bytes 512 to 1023 MB 16 KB 4 KB 1KB 1024 MB to 2 GB 32 KB 4 KB 2 KB 2 to 4 GB 64 KB 4 KB 4 KB 4 to 8 GB Not Supported 4 KB 4 KB 8 to 16 GB Not Supported 8 KB 4 KB 16 to 32 GB Not Supported 16 KB 4 KB >32 GB (up to 2 TB) Not Supported 32 KB 4 KB
  • 30. OS and File System Compatibility Operating System FAT16 FAT32 NTFS Windows XP    Windows 2000    Windows NT   Windows 95, 98, ME   Windows 95  MS-DOS 
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  • 41. Size limits Block size Max file size Max filesystem size 1 KB 16 GB 2 TB 2 KB 256 GB 8 TB 4 KB 2 TB 16 TB 8 KB 2 TB 32 TB
  • 42.
  • 43.