Data corruption is the unintentional modification of a file or the loss of information which often occurs during reading or writing. The reason could be hardware or software fail, and as a result, a file can become partially or fully corrupted, so it'll no longer function properly because its bits shall be scrambled or lost. An image file, for example, will no longer display a true image, but a random combination of colors, an archive will be impossible to unpack for the reason that its content will be unreadable, and so on. When such a problem appears and it isn't noticed by the system or by an administrator, the data will get corrupted silently and when this happens on a disk drive which is part of a RAID array where the information is synchronized between different drives, the corrupted file will be replicated on all of the other drives and the damage will become permanent. Many popular file systems either don't feature real-time checks or don't have good ones that will detect a problem before the damage is done, so silent data corruption is a common problem on web hosting servers where huge amounts of info are stored.
No Data Corruption & Data Integrity in Shared Hosting
We have tackled the issue of silent data corruption on all our shared hosting
servers by using the leading-edge Z file system, or ZFS. The latter is better than other file systems because it is the only one in existence which checks all the files instantly by using a checksum - a digital identifier which is unique for each and every file. When you upload content to your account, it will be stored on several SSD drives and regularly synchronized between them for redundancy. ZFS constantly examines the checksum of all files and in the event that any file is detected as damaged, it's replaced promptly with a good copy from some other disk. As this happens in real time, there is no risk that a bad file may remain or may be duplicated on the rest of the SSDs. ZFS needs plenty of physical memory to execute the real-time checks and the benefit of our cloud web hosting platform is that we work with 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
Your semi-dedicated server
account will be shielded from silent data corruption since all of our storage servers make use of the state-of-the-art ZFS file system. What makes the aforementioned unique is that it uses checksums, or digital identifiers, to ensure the integrity of every single file. When you upload content to your account, it'll be kept on a couple of redundant drives employed in a RAID i.e. the files will be the same across all drives. All the copies of a given file will have the same checksum on all hard drives and ZFS will compare the checksums of the duplicates quickly, so if it finds a mismatch, that would indicate that one of the copies is damaged, it will swap that file with a healthy copy from one of the other disks. Even if there is a sudden power loss, the data on the servers won't be corrupted and there will not be any need for a time-consuming system check which other file systems perform after some breakdown, prolonging the time needed for the server to get back online. ZFS is the only file system that can really protect your content from silent data corruption.