The process of files being corrupted as a consequence of some hardware or software failure is referred to as data corruption and this is among the main problems which hosting companies face since the larger a hard drive is and the more data is stored on it, the more likely it is for data to get corrupted. There are a couple of fail-safes, still often the information is damaged silently, so neither the particular file system, nor the administrators detect anything. Consequently, a damaged file will be handled as a standard one and if the hard drive is part of a RAID, that particular file will be copied on all other disk drives. In theory, this is for redundancy, but in practice the damage will get worse. Once some file gets corrupted, it will be partially or fully unreadable, so a text file will not be readable, an image file will present a random combination of colors if it opens at all and an archive shall be impossible to unpack, and you risk losing your site content. Although the most popular server file systems have various checks, they are likely to fail to detect a problem early enough or require a vast time period to be able to check all the files and the server will not be functional for the time being.
No Data Corruption & Data Integrity in Semi-dedicated Servers
Your semi-dedicated server account will be resistant to silent data corruption because all of our storage servers employ the advanced ZFS file system. What makes the aforementioned unique is that it uses checksums, or digital identifiers, to verify the integrity of every single file. When you upload content to your account, it will be kept on a couple of redundant drives employed in a RAID i.e. the files will be the same on all drives. All copies of a given file will have the same checksum on all hard disks and ZFS will compare the checksums of the copies right away, and if it discovers a mismatch, that would indicate that one of the copies is corrupted, it will swap that file with a good copy from one of the other disks. Even if there's an unforeseen blackout, the data on the servers will not become corrupted and there will not be any need for a time-consuming system check which other file systems perform after some breakdown, lengthening the time needed for the server to get back online. ZFS is the only file system which can really protect your content from silent data corruption.