Details of NTFS file format supported by Windows® 7
What is NTFS file system? What format is supported in Windows 7?
NTFS is a new technology file system was introduced by Microsoft. NTFS is capable of hard drive support of up to 256TB. NTFS a is high performance and self healing file system that supports file level security, compression and auditing. One of the most important features of NTFS is the ability to encrypt files and folders so as to protect your sensitive data. NTFS was designed to be more stable and reliable. NTFS uses a transaction log which will allow it to recover during the event of a system crash. It has the ability to spread data across more than one hard drive. NTFS will provide the ability to protect your files and folders. It also grants users access to files while granting others the ability to modify or delete files.
Here are the different NTFS file formats supported by Windows 7:
- NTFS system file
- NTFS compressed files
- NTFS sparse files
NTFS system file
NTFS includes several system files and these system files are hidden from the view on the NTFS volume. System files are used by the file system so as to store its meta-data and to implement its file system. System files are usually placed on the volume by the format utility. Master file table, log file, volume, attribute definitions, root file name index and cluster bitmap are some of the NTFS system files. These system files have different purposes such as allocation of files, volume representation and accessing of files.
NTFS compressed files
The files which are compressed on NTFS volume can be read and written by any of the Windows based applications without being decompressed by another program. NTFS is able to read a compressed form of data. NTFS will allow the compression of one or more folders or even one or more files within a NTFS volume. The compression algorithms in NTFS will support a cluster size of up to 4KB. Then when the cluster volume is greater than 4KB NTFS compression functions are not available. When the compressed files are open, NTFS will provide real time access to compressed files.
A sparse file has got an attribute which will cause the Input/Output system to assign only meaningful data. The NTFS will de-allocate sparse data and it will maintain other data as allocated data. Then when a program accesses a sparse data stream, NTFS file system will yield the allocated data as actual data. NTFS has got sparse file support for both compressed and uncompressed files.
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