Data corruption is the damage of info caused by various hardware or software problems. After a file gets corrupted, it will no longer work accurately, so an application will not start or shall give errors, a text file could be partially or entirely unreadable, an archive will be impossible to open then unpack, etc. Silent data corruption is the process of data getting harmed without any identification by the system or an admin, that makes it a serious problem for hosting servers as failures are more likely to occur on larger hard disk drives where large volumes of information are stored. If a drive is part of a RAID and the information on it is copied on other drives for redundancy, it is more than likely that the damaged file will be treated as a good one and will be copied on all drives, making the harm permanent. A lot of the file systems that run on web servers nowadays often cannot find corrupted files immediately or they need time-consuming system checks during which the server is not operational.