The process of files being corrupted as a consequence of some hardware or software failure is called data corruption and this is one of the main problems which web hosting companies face since the larger a hard disk is and the more data is placed on it, the more likely it is for data to become corrupted. There're several fail-safes, yet often the info becomes damaged silently, so neither the file system, nor the admins see a thing. As a result, a bad file will be handled as a regular one and if the hard drive is a part of a RAID, the file will be duplicated on all other disk drives. In principle, this is done for redundancy, but in practice the damage will get worse. Once a given file gets damaged, it will be partly or entirely unreadable, which means that a text file will not be readable, an image file will display a random blend of colors in case it opens at all and an archive will be impossible to unpack, so you risk sacrificing your website content. Although the most widely used server file systems include various checks, they are likely to fail to detect some problem early enough or require a vast amount of time to be able to check all the files and the web hosting server will not be functional for the time being.
No Data Corruption & Data Integrity in Website Hosting
We have resolved the matter of silent data corruption on our website hosting
servers by using the advanced Z file system, or ZFS. The latter is better than other file systems as it is the only one in existence which checks all the files right away by using a checksum - a digital identifier that's unique for each file. When you upload content to your account, it'll be stored on several SSD drives and frequently synced between them for redundancy. ZFS regularly examines the checksum of all files and in case any file is detected as damaged, it's replaced immediately with a good copy from another disk. As this happens in real time, there's no risk that a bad file may remain or may be copied on the remaining SSDs. ZFS requires plenty of physical memory in order to carry out the real-time checks and the advantage of our cloud website hosting platform is that we take advantage of multiple powerful servers working together. If you host your sites with us, your data will be intact no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Hosting
We've avoided any chance of files getting corrupted silently because the servers where your semi-dedicated hosting
account will be created employ a powerful file system known as ZFS. Its basic advantage over various other file systems is that it uses a unique checksum for each file - a digital fingerprint which 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 corresponds to the one on the rest of the drives and the one it has saved. When there is a mismatch, the corrupted copy is replaced with a good one from one of the other drives and since it happens in real time, there's no chance that a corrupted copy could remain on our servers or that it can be copied to the other hard disks 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 an unexpected power failure, none of them can identify silently corrupted files. In contrast, ZFS won't crash after a blackout and the regular checksum monitoring makes a time-consuming file system check obsolete.