Data corruption is the accidental change of a file or the losing of information which often occurs during reading or writing. The reason can be hardware or software malfunction, and due to this fact, a file can become partially or fully corrupted, so it will no longer function properly as its bits will be scrambled or lacking. An image file, for instance, will no longer present an actual image, but a random mix of colors, an archive will be impossible to unpack as its content will be unreadable, etc. If such a problem occurs and it is not identified by the system or by an administrator, the data will become corrupted silently and when this happens on a disk drive which is a part of a RAID array where the information is synced between various drives, the corrupted file shall be duplicated on all the other drives and the damage will become long term. Numerous commonly used file systems either don't have real-time checks or don't have good ones which will detect a problem before the damage is done, so silent data corruption is a very common matter on hosting servers where substantial volumes of info are stored.