The process of files being corrupted because of some hardware or software failure is referred to as data corruption and this is among the main problems that Internet hosting companies face because the larger a hard disk is and the more data is kept on it, the more likely it is for data to become corrupted. You will find several fail-safes, still often the data gets corrupted silently, so neither the particular file system, nor the admins detect a thing. Thus, a bad file will be handled as a regular one and if the hard disk drive is a part of a RAID, that file will be copied on all other drives. In principle, this is for redundancy, but in reality the damage will be worse. When some file gets corrupted, it will be partly or fully unreadable, therefore a text file will no longer be readable, an image file will display a random combination of colors if it opens at all and an archive will be impossible to unpack, so you risk losing your content. Although the most widespread server file systems include various checks, they quite often fail to detect a problem early enough or require a long amount of time to check all the files and the web server will not be functional for the time being.
No Data Corruption & Data Integrity in Semi-dedicated Hosting
You won't encounter any silent data corruption issues whatsoever if you buy one of our semi-dedicated hosting solutions due to the fact that the ZFS file system that we employ on our cloud hosting platform uses checksums in order to guarantee that all of your files are undamaged all the time. A checksum is a unique digital fingerprint that is allotted to each and every file stored on a server. Because we store all content on a number of drives at the same time, the same file has the same checksum on all of the drives and what ZFS does is that it compares the checksums between the different drives in real time. In case it detects that a file is corrupted and its checksum is different from what it should be, it replaces that file with a healthy copy without delay, avoiding any chance of the bad copy to be synchronized on the remaining drives. ZFS is the sole file system you can get which uses checksums, which makes it far superior to other file systems that are unable to identify silent data corruption and duplicate bad files across hard drives.