Data corruption is the accidental modification of a file or the losing of info which often occurs during reading or writing. The reason can be hardware or software malfunction, and for that reason, a file could become partially or completely corrupted, so it'll no longer work as it should since its bits shall be scrambled or lacking. An image file, for instance, will no longer show a true image, but a random combination of colors, an archive will be impossible to unpack as its content will be unreadable, etc. In case such an issue appears and it is not found by the system or by an admin, the data will become corrupted silently and in case this happens on a drive that's part of a RAID array where the information is synced between different drives, the corrupted file will be reproduced on all the other drives and the damage will be permanent. A number of widely used file systems either don't have real-time checks or don't have good ones which will detect an issue before the damage is done, so silent data corruption is a very common matter on hosting servers where huge amounts of info are stored.
No Data Corruption & Data Integrity in Cloud Web Hosting
We have dealt with the issue of silent data corruption on all our cloud web hosting servers by using the state-of-the-art Z file system, or ZFS. The latter is more advanced than other file systems as it is the only one in existence that checks all files in real time by using a checksum - a digital identifier that's unique for every single file. When you upload content to your account, it'll be stored on several SSD drives and continually synced between them for redundancy. ZFS constantly examines the checksum of all files and if any file is detected as corrupted, it's replaced right away 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 duplicated on the remaining SSDs. ZFS needs plenty of physical memory in order to perform the real-time checks and the advantage of our cloud website hosting platform is that we take advantage of multiple very powerful servers working together. If you host your Internet sites with us, your info will be intact no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Servers
We've avoided any risk of files getting damaged silently due to the fact that the servers where your semi-dedicated server account will be created employ a powerful file system known as ZFS. Its main 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 whether the fingerprint of a file on one drive matches the one on the remaining drives and the one it has stored. In case there is a mismatch, the damaged copy is replaced with a good one from one of the other drives and since it happens right away, there's no chance that a corrupted copy can remain on our hosting servers or that it can be duplicated to the other hard drives in the RAID. None of the other file systems employ this kind of checks and furthermore, even during a file system check following an unexpected electrical power failure, none of them can identify silently corrupted files. In comparison, ZFS doesn't crash after a power loss and the continual checksum monitoring makes a lenghty file system check unnecessary.