It depends on what you are referring to - the file system for the partition/volume that the operating system sits on, or the partition/volume that non-system data sits on.
For operating systems, there are usually certain restraints on which types of file systems you can use. Generally Windows versions after XP will work only with NTFS. The main reason is that it's a journaled filesystem (it keeps records of what was done on the disk to help it recover in the case of a crash), and it supports a larger filesize per file (as opposed to 4GB file limits on a FAT32 volume), as well as supports ACLs (for resource access permissions), filesystem-level compression (LZNT1) and encryption (EFS), hard links, and more.
Generally you cannot change the filesystem unless if you format it (which will wipe the filesystem tables only, but does not delete the data [although it will appear to have been lost, but is still recoverable via data recovery])
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DVDs primarily use the UDF file system, although it is possible to use the ISO 9660 file system as well.
Solaris employs the file system called UFS (UNIX file system) for its native file system type.
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NT FILE SYSTEM (ntfs)
Prior to the use of DBMS Traditional file processing system were in use . These were the system that are used as database that time. These system do not supports the query.
NTFS (New Technology File System)
Prior to the use of DBMS Traditional file processing system were in use . These were the system that are used as database that time. These system do not supports the query.
Floppy disks use a FAT file system.
Windows 2000 will automatically use the FAT32 file system
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A file system is necessary for a computer to work with files; however, a file system is not a physical object, and is pretty useless without a computer to use it on.