Data corruption is the accidental change of a file or the losing of information which usually occurs during reading or writing. The reason could be hardware or software malfunction, and as a consequence, a file may become partially or entirely corrupted, so it will no longer work correctly since its bits will be scrambled or lacking. An image file, for instance, will no longer present an accurate image, but a random mix of colors, an archive will be impossible to unpack as its content will be unreadable, etcetera. If this kind of a problem occurs and it isn't recognized by the system or by an admin, the data will be corrupted silently and when this happens on a drive that's part of a RAID array where the information is synchronized between different drives, the corrupted file shall be reproduced on all the other drives and the damage will be long term. Numerous commonly used file systems either don't have real-time checks or don't have good ones which can detect an issue before the damage is done, so silent data corruption is a common problem on internet hosting servers where huge volumes of info are stored.