Introduction to File Systems 9/27/2006

NTFS New Technology File System Each volume has its own directory NOT a rewrite of FAT system, but rather a totally new file system A journaled file system providing for recovery after abnormal shutdown Allows for compression, encryption, and disk quotas Security can be managed by the use of groups, assigned to folders or files, and uses a discretionary access list to provide extended assignment of authorities beyond simply read/write functions Supports spanning volumes allowing files to cross over physical disk boundaries and mount points to work beyond the drive letter limitation Supports long file names but does not preserve case by default. It can do so to support POSIX. Maximum filename size is 256 bytes Allows for dynamic disk, the ability to expand a partition using available free space Supports up to 16 EB per file and a volume size limit of 256TB Provides for indexed accessing of documents

EXT3 Third Extended File System A single “Root” directory EXT2 with the addition of journaling to provide for recovery Security can be assigned to groups and the to individual files for basic read/write functions only File size maximum of 2TB though this can be expanded using LFS (large file support) and a 32TB limit on volumes File names are case sensitive and can be up to 255 characters in length Does not support transparent compression. Encryption is only available at the device level

Cross Access NTFS from Linux Paragon NTFS for Linux gives transparent access to any NTFS partition under Linux OS Captive NTFS provides Read/Write access to NTFS partitions from Linux EXT3 from Windows EXT2IFS is an Installable File System Driver (IFS) for Microsoft Windows NT 4.0, Microsoft Windows 2000 (NT 5.0) and Microsoft Windows XP (NT 5.1). The driver can read the Second Extended File System (EXT2) and Third Extended File System (EXT3)

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