Tuesday, March 19, 2019
Structure of NTFS :: essays research papers
Structure of NTFSThe NTFS file away system is use in tout ensemble critical Microsoft Windows systems. It is an advanced file system that makes it different from the UNIX file systems that the victor TCT was designed for. This document gives a quick overview of NTFS and how it was implemented. The biggest difference is the use of alter Data Streams (ADS) when specifying a meta data structure.MFT The Master File Table (MFT) contains entries that strike all system files, user files, and directories. The MFT even contains an entry (0) that describes the MFT itself, which is how we determine its new size. Other system files in the MFT include the Root Directory (5), the cluster allocation map, Security Descriptors, and the journal. MFT ENTRIES Each MFT entry is given a number (similar to Inode rime in UNIX). The user files and directories start at MFT 25. The MFT entry contains a refer of designates. Example attributes include "Standard Information" which stores data su ch as MAC times, "File Name" which stores the file or directories name(s), $DATA which stores the unfeigned file content, or "Index Alloc" and "Index Root" which contain directory table of contents stored in a B-Tree. Each fibre of attribute is given a numerical prize and more than than star instance of a role can exist for a file. The "id" cling to for each attribute allows one to specify an instance. A given file can have more than one "$Data" attribute, which is a method that can be used to hide data from an investigator. To get a mapping of attribute type values to name, use the fsstat command. It displays the contents of the $AttrDef system file. Each attribute has a header and a value and an attribute is either resident or non-resident. A resident attribute has both the header and the content value stored in the MFT entry. This only works for attributes with a small value (the file name for example). For larger attributes, the hea der is stored in the MFT entry and the content value is stored in Clusters in the data area. A Cluster in NTFS is the identical as FAT, it is a consecutive group of sectors. If a file has as well many different attributes, an " set apart List" is used that stores the other attribute headers in additional MFT entries. FILES Files in NTFS typically have the following attributes S.N.     Attribute     Description1.          $STANDARD_INFORMATION      Contains MAC times, security ID, Owners ID, permissions in DOS format, and quota data.