The process of files being damaged resulting from some hardware or software failure is referred to as data corruption and this is among the main problems which Internet hosting companies face as the larger a hard disk is and the more data is filed on it, the much more likely it is for data to be corrupted. You can find various fail-safes, yet often the info is corrupted silently, so neither the file system, nor the admins see anything. Consequently, a corrupted file will be treated as a good one and if the hard drive is part of a RAID, that file will be copied on all other drives. In principle, this is for redundancy, but in practice the damage will get even worse. When a given file gets corrupted, it will be partly or entirely unreadable, which means that a text file will not be readable, an image file will show a random combination of colors in case it opens at all and an archive shall be impossible to unpack, so you risk sacrificing your site content. Although the most widely used server file systems have various checks, they are likely to fail to identify a problem early enough or require an extensive amount of time to be able to check all of the files and the server will not be operational for the time being.
No Data Corruption & Data Integrity in Web Hosting
We've tackled the matter of silent data corruption on our web hosting
servers by using the state-of-the-art Z file system, or ZFS. The latter is more advanced than other file systems because it is the only one in existence that checks all the files instantly by employing a checksum - a digital identifier that is unique for every single file. When you upload content to your account, it'll be stored on several SSD drives and constantly synchronized between them for redundancy. ZFS constantly examines the checksum of all files and if any file is detected as damaged, it is replaced immediately with a good copy from some other 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 perform the real-time checks and the advantage of our cloud web hosting platform is that we use multiple very powerful servers working together. If you host your websites with us, your info will be intact no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Servers
Your semi-dedicated server
account will be shielded from silent data corruption as all of our storage servers make use of the innovative ZFS file system. What makes the latter unique is that it employs checksums, or digital identifiers, in order to verify the integrity of every single file. When you upload content to your account, it will be stored on several redundant drives working in a RAID i.e. the files shall be the same on all drives. All of the copies of a given file will have the same checksum on all drives and ZFS will compare the checksums of the duplicates right away, so if it finds a mismatch, that will indicate that one of the copies is corrupted, it will substitute that file with a good copy from one of the other disks. Even if there's an unexpected blackout, the data on the servers won't be corrupted and there will not be any need for a time-consuming system check that other file systems perform after some failure, prolonging the time needed for the server to go back online. ZFS is the sole file system which can really protect your content from silent data corruption.