Data corruption is the unintended transformation of a file or the losing of information which often occurs during reading or writing. The reason could be hardware or software malfunction, and as a consequence, a file may become partially or completely corrupted, so it will no longer function correctly because its bits will be scrambled or lost. An image file, for instance, will no longer show a real image, but a random combination of colors, an archive will be impossible to unpack for the reason that its content will be unreadable, etcetera. When this kind of an issue occurs and it is not recognized by the system or by an admin, the data will be corrupted silently and if this happens on a drive that's part of a RAID array where the information is synchronized between various different drives, the corrupted file will be duplicated on all the other drives and the harm will be permanent. Many widely used file systems either don't offer real-time checks or don't have good ones which can detect an issue before the damage is done, so silent data corruption is a common problem on internet hosting servers where large volumes of information are stored.

No Data Corruption & Data Integrity in Web Hosting

We've tackled the issue of silent data corruption on our web hosting servers by using the advanced Z file system, or ZFS. The latter is better than other file systems because it is the only one in existence which checks all the files right away by using a checksum - a digital identifier that is unique for every single file. When you upload content to your account, it'll be stored on several SSD drives and regularly synchronized between them for redundancy. ZFS constantly analyzes the checksum of all files and in the event that any file is detected as damaged, it is replaced promptly with a good copy from another disk. As this happens in real time, there's no risk that a damaged file may remain or may be duplicated on the other SSDs. ZFS requires lots of physical memory to perform the real-time checks and the benefit of our cloud hosting platform is that we use multiple very powerful servers working together. In case you host your sites with us, your information will be intact no matter what.

No Data Corruption & Data Integrity in Semi-dedicated Servers

We have avoided any risk of files getting damaged silently as the servers where your semi-dedicated server account will be created work with a powerful file system called ZFS. Its advantage over alternative file systems is that it uses a unique checksum for each and every file - a digital fingerprint which is checked in real time. As we save all content on numerous SSD drives, ZFS checks whether the fingerprint of a file on one drive matches the one on the other drives and the one it has saved. In the event that there is a mismatch, the damaged copy is replaced with a healthy one from one of the other drives and because it happens instantly, there's no chance that a damaged copy can remain on our web hosting servers or that it can be duplicated to the other drives in the RAID. None of the other file systems work with this type of checks and what's more, even during a file system check following a sudden electrical power failure, none of them can find silently corrupted files. In contrast, ZFS doesn't crash after a power failure and the regular checksum monitoring makes a lenghty file system check obsolete.