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Principles of Data Storage

Posted in Hard Disk Data Recovery by manyu time 26 Dec Bookmark and Share

Principles of Data Storage include file read-write-delete.
File read
The operating system to read files information from the directory area (including file name, extension name, file size, modification date and file in the data area to save the first cluster of the cluster number), we here assume that the first cluster number is 0023.
Operating systems read the corresponding data from 0023 cluster, and then find the 0023 unit of FAT, if the content is a file end marker (FF), means end of file, or save the data under a cluster of cluster number, so continue to repeat until the encountered end of file mark.
File write
When we want to save the file, the operating system first in the DIR found an empty area district to write the file name, size, create time and the appropriate information, then find the unused space in the Data area to save the file, and write the first cluster to DIR in Data area, the rest movements and actions are like the above.
Files delete
it is very simple, just do a little bit in the directory area of small changes – change the first character to E5 on the file directory area, the file would be deleted.

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