It is about finding data that still exists on the hard drive but which currently can't be located by the Operating System. This in fact is the underlying principal of data recovery.
The deleted file data is still there, but the Computer Operating System no longer knows it exists.
NTFS UNDELETE FILE WINDOWS
What the Windows Operating System does NOT do is go out to the clusters on the hard disk where the files data is actually stored and wipe the contents of these clusters. The computer now looks at the clusters occupied by that file as being empty and therefore available space to store a new file. When a file is deleted the Operating System marks the file name in the MFT with a special character that signifies to the computer that the file has been deleted. The 'real' deletion (at least as far as this article is concerned) is what happens when the Recycle Bin is emptied or the deletion bypasses the Windows Recycle Bin altogether.
You may think of the Windows Recycle Bin as just another fancy storage folder on your hard drive. When you select a file and press the delete key on a Windows computer the file is sent to the Recycle Bin. Lets look to see what happens when you intentionally delete a file and why it may be possible to bring that file back. Whilst an MFT is more complex, the principal of locating the start of a file and its subsequent storage clusters is essentially the same.
NTFS UNDELETE FILE WINDOWS 7
The NTFS File System is what you are likely to encounter on newer hard disk running operating systems like Windows 7 or 2008. It is important to realize that this information is stored completely separate from your file data and is why FAT data recovery is possible. It then uses a special table at the start of the disk know as the File Allocation Table or FAT to identify the remaining clusters that are used to store the file. In order to find a file the Operating System uses this information to get to the first storage cluster of a file. This is the place which stores the name of a file, the location of its starting cluster, and the size of the file. Other directories can be located anywhere in the data area of the disk.Įach file on a FAT system has a "directory entry". On a FAT file system the Root directory is given special status and is usually positioned at the start of the disk. The top level directory is referred to as the “Root”. A directory itself is considered by FAT to be a special type of file. In 2006 Microsoft released exFAT to address this issue and to improve performance on large media.Įvery file on a FAT hard disk is stored in a directory (folder). A disadvantage of FAT32 is its maximum file size limit of 4GB.
This is largely due to the fact that it is a convenient way of sharing data between different operating systems.
Its latter version, FAT32 (released with Windows 95), is still widely used as the format for removable storage devices. The File Allocation Table file system (FAT) is a cluster based file system first developed in the mid 1970’s. Microsoft has two common file storage systems known as FAT (File Allocation Table) and NTFS (New Technology File System).
NTFS UNDELETE FILE SOFTWARE
Hard drives Hardware recovery File storage NTFS and FAT Recovery Software recovery File Allocation Table (FAT) or Master File Table (MFT): NTFS recovery and FAT recovery
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