Data corruption is the unintended transformation of a file or the loss of information that usually occurs during reading or writing. The reason can be hardware or software fail, and consequently, a file may become partially or fully corrupted, so it'll no longer work as it should since its bits shall be scrambled or missing. An image file, for example, will no longer display an actual image, but a random mix of colors, an archive will be impossible to unpack because its content will be unreadable, etcetera. In case such an issue occurs and it's not recognized by the system or by an administrator, the data will become corrupted silently and when this happens on a disk drive which is part of a RAID array where the data is synchronized between various drives, the corrupted file shall be replicated on all the other drives and the damage will become long term. Numerous widespread file systems either do not feature real-time checks or don't have high quality ones which can detect an issue before the damage is done, so silent data corruption is a common matter on internet hosting servers where large amounts of data are stored.