The process of files getting corrupted owing to some hardware or software failure is known as data corruption and this is among the main problems which Internet hosting companies face as the larger a hard disk drive is and the more data is filed on it, the more likely it is for data to become corrupted. You will find different fail-safes, yet often the information gets damaged silently, so neither the file system, nor the administrators see anything. Consequently, a corrupted file will be treated as a good one and if the HDD is a part of a RAID, that particular file will be duplicated on all other disk drives. In theory, this is done for redundancy, but in reality the damage will get worse. When a file gets corrupted, it will be partly or completely unreadable, so a text file will no longer be readable, an image file will present a random combination of colors in case it opens at all and an archive will be impossible to unpack, so you risk sacrificing your website content. Although the most commonly used server file systems include various checks, they quite often fail to discover a problem early enough or require a long period of time to check all the files and the web server will not be operational for the time being.