The process of files being corrupted resulting from some hardware or software failure is known as data corruption and this is one of the main problems which hosting companies face since the larger a hard disk drive is and the more information is kept on it, the more likely it is for data to become corrupted. You will find several fail-safes, still often the info is corrupted silently, so neither the particular file system, nor the administrators notice a thing. Thus, a bad file will be treated as a standard one and if the hard disk is a part of a RAID, that particular file will be copied on all other disk drives. Theoretically, this is for redundancy, but in reality the damage will get even worse. The moment some file gets corrupted, it will be partly or entirely unreadable, therefore a text file will not be readable, an image file will show a random combination of colors in case it opens at all and an archive will be impossible to unpack, and you risk losing your site content. Although the most well-known server file systems include various checks, they often fail to detect a problem early enough or require a long amount of time to check all the files and the web hosting server will not be operational for the time being.
No Data Corruption & Data Integrity in Cloud Web Hosting
We have resolved the matter of silent data corruption on all of our cloud web hosting servers by using the hi-tech Z file system, or ZFS. The latter is better than other file systems since it is the only one in existence that checks all files right away by employing a checksum - a digital identifier that is unique for every single file. When you upload content to your account, it will be stored on several SSD drives and regularly synced between them for redundancy. ZFS regularly compares the checksum of all files and when any file is detected as damaged, it is replaced immediately with a good copy from some other disk. As this happens in real time, there's no risk that a damaged file may remain or may be copied on the other SSDs. ZFS requires lots of physical memory in order to perform the real-time checks and the benefit of our cloud website hosting platform is that we employ multiple very powerful servers working together. If you host your Internet sites with us, your info will be undamaged no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Servers
We've avoided any risk of files getting damaged silently because the servers where your semi-dedicated server account will be created work with a powerful file system called ZFS. Its advantage over other file systems is that it uses a unique checksum for each file - a digital fingerprint that's checked in real time. As we store all content on a number of SSD drives, ZFS checks if the fingerprint of a file on one drive corresponds to the one on the remaining drives and the one it has saved. In case there is a mismatch, the bad copy is replaced with a healthy one from one of the other drives and since this happens right away, there is no chance that a corrupted copy could remain on our hosting servers or that it could be duplicated to the other drives in the RAID. None of the other file systems employ such checks and furthermore, even during a file system check following a sudden electrical power failure, none of them can discover silently corrupted files. In comparison, ZFS won't crash after an electrical power failure and the constant checksum monitoring makes a time-consuming file system check unnecessary.