Data corruption is the damage of information caused by various software or hardware fails. After a file gets corrupted, it will no longer function correctly, so an application will not start or will give errors, a text file will be partially or completely unreadable, an archive will be impossible to open and unpack, etc. Silent data corruption is the process of information getting damaged without any identification by the system or an admin, that makes it a significant problem for website hosting servers as problems are much more likely to happen on larger hard disk drives where large volumes of information are located. If a drive is a part of a RAID and the data on it is duplicated on other drives for redundancy, it is likely that the bad file will be treated as an undamaged one and it will be duplicated on all of the drives, making the damage permanent. A huge number of the file systems that operate on web servers today often are unable to find corrupted files immediately or they need time-consuming system checks during which the server isn't functioning.