Data corruption is the unintended change of a file or the losing of information that usually occurs during reading or writing. The reason may be hardware or software failure, and because of this, a file could become partially or entirely corrupted, so it will no longer work as it should as its bits shall be scrambled or lost. An image file, for instance, will no longer present a real image, but a random mix of colors, an archive will be impossible to unpack because its content will be unreadable, and so on. In the event that such an issue appears and it's not found by the system or by an admin, the data will get corrupted silently and in case this happens on a disk drive that is part of a RAID array where the data is synced between various drives, the corrupted file shall be copied on all other drives and the harm will be permanent. Numerous commonly used file systems either don't feature real-time checks or do not have good ones which can detect a problem before the damage is done, so silent data corruption is a very common issue on hosting servers where large amounts of information are kept.
No Data Corruption & Data Integrity in Hosting
We've resolved the matter of silent data corruption on all our hosting servers by using the advanced Z file system, or ZFS. The latter is better than other file systems because it is the only one out there which checks all the files right away 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 compares the checksum of all files and if any file is detected as corrupted, it's replaced quickly with a good copy from another disk. As this happens in real time, there is no risk that a damaged file may remain or may be copied on the other SSDs. ZFS requires a lot of physical memory in order to execute the real-time checks and the advantage of our cloud website hosting platform is that we work with multiple powerful servers working together. If you host your sites with us, your info will be intact no matter what.