Data corruption is the damage of data caused by various hardware or software problems. After a file gets corrupted, it will no longer work correctly, so an app will not start or shall give errors, a text file could be partially or completely unreadable, an archive file will be impossible to open and unpack, etc. Silent data corruption is the process of data getting damaged without any acknowledgement by the system or an admin, which makes it a serious problem for website hosting servers as problems are much more likely to occur on bigger hard drives where considerable volumes of information are located. When a drive is a part of a RAID and the info on it is duplicated on other drives for redundancy, it is very likely that the damaged file will be treated as an ordinary one and will be copied on all of the drives, making the damage permanent. Lots of the file systems that operate on web servers these days often are unable to identify corrupted files right away or they need time-consuming system checks during which the server is not operational.
No Data Corruption & Data Integrity in Cloud Website Hosting
The integrity of the data that you upload to your new cloud website hosting account shall be guaranteed by the ZFS file system which we take advantage of on our cloud platform. Most web hosting service providers, including our company, use multiple hard disk drives to store content and since the drives work in a RAID, exactly the same data is synchronized between the drives all the time. If a file on a drive is damaged for reasons unknown, yet, it is more than likely that it will be reproduced on the other drives because other file systems don't offer special checks for this. Unlike them, ZFS uses a digital fingerprint, or a checksum, for each file. In case a file gets damaged, its checksum won't match what ZFS has as a record for it, therefore the bad copy shall be swapped with a good one from another hard disk. Due to the fact that this happens instantly, there is no possibility for any of your files to ever be corrupted.
No Data Corruption & Data Integrity in Semi-dedicated Servers
We've avoided any possibility of files getting corrupted silently because the servers where your semi-dedicated server account will be created take advantage of a powerful file system called ZFS. Its basic advantage over various other file systems is that it uses a unique checksum for each file - a digital fingerprint that is checked in real time. Since we store 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 stored. In the event that there is a mismatch, the damaged copy is replaced with a good one from one of the other drives and because it happens in real time, there is no chance that a damaged copy can remain on our web servers or that it can be duplicated to the other hard drives in the RAID. None of the other file systems employ such checks and what is more, even during a file system check following an unexpected power failure, none of them will identify silently corrupted files. In contrast, ZFS won't crash after a blackout and the regular checksum monitoring makes a lenghty file system check unneeded.