Data corruption is the unintentional change of a file or the loss of info which usually occurs during reading or writing. The reason could be hardware or software malfunction, and for that reason, a file may become partially or fully corrupted, so it'll no longer work as it should as its bits will be scrambled or lost. An image file, for example, will no longer show an actual image, but a random mix of colors, an archive will be impossible to unpack for the reason that its content will be unreadable, etcetera. If such a problem appears and it's not found by the system or by an administrator, the data will become corrupted silently and when this happens on a drive which is part of a RAID array where the info is synced between various different drives, the corrupted file shall be copied on all the other drives and the damage will be permanent. A number of widely used file systems either do not feature real-time checks or don't have good ones that will detect an issue before the damage is done, so silent data corruption is a very common problem on internet hosting servers where huge volumes of data are stored.

No Data Corruption & Data Integrity in Cloud Web Hosting

We've dealt with the issue of silent data corruption on our cloud web hosting servers by using the modern Z file system, or ZFS. The latter is more advanced than other file systems since it is the only one on the market which checks all the files instantly by using a checksum - a digital identifier that's unique for each file. When you upload content to your account, it will be stored on several SSD drives and continually synchronized between them for redundancy. ZFS constantly analyzes the checksum of all files and if any file is detected as corrupted, it's replaced quickly with a good copy from some other disk. As this happens in real time, there's no risk that a corrupted file may remain or may be copied on the rest of the SSDs. ZFS needs lots of physical memory to execute the real-time checks and the advantage of our cloud web hosting platform is that we take advantage of multiple powerful servers working together. If you host your websites with us, your data will be intact no matter what.

No Data Corruption & Data Integrity in Semi-dedicated Servers

We've avoided any risk of files getting corrupted silently as the servers where your semi-dedicated server account will be created use a powerful file system known as ZFS. Its main advantage over alternative file systems is that it uses a unique checksum for every single file - a digital fingerprint that is checked in real time. As we keep all content on multiple 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 case there's a mismatch, the corrupted copy is replaced with a healthy one from one of the other drives and because it happens right away, there is no chance that a corrupted 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 use this kind of checks and what's more, even during a file system check after a sudden electrical power failure, none of them will discover silently corrupted files. In comparison, ZFS does not crash after a power failure and the continual checksum monitoring makes a lenghty file system check obsolete.