Data corruption is the damage of info due to various hardware or software problems. After a file gets corrupted, it will no longer work properly, 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 information getting harmed without any acknowledgement by the system or an admin, which makes it a serious problem for website hosting servers as failures are much more likely to happen on larger hard drives where vast volumes of information are stored. In case a drive is a part of a RAID and the info on it is replicated on other drives for redundancy, it is more than likely that the damaged file will be treated as a healthy one and will be duplicated on all drives, making the harm permanent. A lot of the file systems that operate on web servers today often are unable to find corrupted files in real time or they need time-consuming system checks during which the server is not functioning.