Data corruption is the unintended modification of a file or the losing of info which usually occurs during reading or writing. The reason could be hardware or software malfunction, and due to this fact, a file could become partially or completely corrupted, so it will no longer work correctly as its bits shall be scrambled or missing. An image file, for example, will no longer display an accurate image, but a random combination of colors, an archive will be impossible to unpack since its content will be unreadable, and so on. In the event that such a problem occurs and it is not identified by the system or by an administrator, the data will become corrupted silently and in case this happens on a disk drive which is a part of a RAID array where the info is synced between various different drives, the corrupted file shall be replicated on all of the other drives and the harm will become long term. A number of widespread file systems either don't offer real-time checks or don't have good ones that will detect an issue before the damage is done, so silent data corruption is a very common problem on web hosting servers where substantial amounts of information are stored.