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Solved By : Tahir Siddiqui(Mani)
As you
know that file system plays a significant role to ensure integrity of data. In
order to protect the data, file systems employ various access control
techniques for secured access of file system operations such as deleting or
modifying files. Now, you are required to identify a file system having top
security features from existing file systems and briefly discuss any two
prominent features which make the file system secure.
ANS
NTFS stands for "New Technology File System having
top security features
NTFS (NT file system; sometimes New Technology
File System) is the file system that the Windows NT operating system uses for storing and
retrieving files on a hard disk. NTFS is the Windows NT
equivalent of the Windows 95 file allocation table (FAT) and the OS/2 High
Performance File System (HPFS). However, NTFS offers
a number of improvements over FAT and HPFS in terms of performance,
extendibility, and security.
The Windows NT file system (NTFS) provides a
combination of performance, reliability, and compatibility not found in the FAT
file system.
The
NTFS file system includes security features required for file servers and
high-end personal computers in a corporate environment.
The
NTFS file system also supports data access control and ownership privileges
that are important for the integrity of critical data. While folders shared on
a Windows NT computer are assigned particular permissions, NTFS files and
folders can have permissions assigned whether they are shared or not.
NTFS
is the only file system on Windows NT that allows you to assign permissions to
individual files.
The
NTFS file system has a simple, yet very powerful design. Basically, everything
on the volume is a file and everything in a file is an attribute, from the data
attribute, to the security attribute, to the file name attribute. Every sector
on an NTFS volume that is allocated belongs to some file. Even the file system
metadata (information that describes the file system itself) is part of a file.
Features of NTFS
File System
NTFS stands for "New Technology File System
The following are some of the
main features of NTFS File System.
Naming Conventions
·
File names can be
up to 255 characters
·
File names can contain
most characters except “ / \ * | :
·
File names are not
case sensitive
Security
NTFS provides file and
folder security. Files and folders are safer than FAT. Security is maintained
by assigning NTFS permissions to files and folders. Security is maintained at
the local level and the network level. The permissions can be assigned to
individual files and folders. Each file or folder in an NTFS partition has an Access Control List. It contains the users and group
security identifier (SID) and the privileges granted to them.
Partition Size
The NTFS partition and file sizes
are much bigger than FAT partitions and files. The maximum size of an NTFS
partition or file can be 16 Exabyte. However, the practical limitation is
two Terabytes. The file size can be in the range of 4GB to
64GB.
File compression
NTFS provides file compression
of as much as 50%.
High reliability
NTFS is highly reliable. It is
recoverable file system. It uses transaction logs to
update the file and folders logs automatically. The
system also has a great amount of fault tolerance. It means that if transaction
fails due to power or system failure, the logged transactions are used to
recover the data.
Bad cluster Mapping
NTFS supports bad-cluster
mapping. It means that file system detects bad clusters or areas of disk with errors. If there
is any data in those clusters, it
is retrieved and stored on another area. The bad clusters are marked to prevent data storage in
those areas in futre.
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