Data corruption is the damage of info caused by various hardware or software fails. After a file gets damaged, it will no longer function properly, so an application will not start or will give errors, a text file shall be partially or completely unreadable, an archive will be impossible to open then unpack, etc. Silent data corruption is the process of information getting harmed without any identification by the system or an admin, which makes it a serious problem for web hosting servers as problems are very likely to occur on larger hard disk drives where considerable volumes of information are placed. When a drive is part of a RAID and the data on it is copied on other drives for redundancy, it's very likely that the damaged file will be treated as a regular one and will be duplicated on all of the drives, making the damage permanent. A huge number of the file systems which run on web servers today often are not able to find corrupted files in real time or they need time-consuming system checks through which the server is not operational.

No Data Corruption & Data Integrity in Shared Hosting

We've resolved the problem of silent data corruption on our shared hosting servers by using the amazing Z file system, or ZFS. The latter is superior to other file systems as it is the only one on the market that checks all of the files immediately by using a checksum - a digital identifier that's unique for each and every 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 examines the checksum of all files and when any file is detected as corrupted, it's replaced quickly 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 rest of the SSDs. ZFS needs a lot of physical memory to perform the real-time checks and the benefit of our cloud hosting platform is that we use multiple powerful servers working together. If you host your sites with us, your information will be undamaged no matter what.

No Data Corruption & Data Integrity in Semi-dedicated Servers

We've avoided any risk of files getting corrupted silently because the servers where your semi-dedicated server account will be created work with a powerful file system called ZFS. Its main advantage over other file systems is that it uses a unique checksum for each file - a digital fingerprint that is checked in real time. As we save all content on a number of SSD drives, ZFS checks if the fingerprint of a file on one drive matches the one on the other drives and the one it has saved. If there's a mismatch, the bad copy is replaced with a healthy one from one of the other drives and considering that it happens right away, there is no chance that a damaged copy can remain on our servers or that it can 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 right after an unexpected blackout, none of them will discover 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.