Data corruption is the unintended transformation of a file or the losing of information that often occurs during reading or writing. The reason may be hardware or software malfunction, and as a result, a file could become partially or completely corrupted, so it'll no longer function correctly because its bits shall be scrambled or lacking. An image file, for example, will no longer present a real image, but a random mix of colors, an archive will be impossible to unpack as its content will be unreadable, and so on. In case this kind of a problem appears and it isn't recognized by the system or by an admin, the data will be corrupted silently and when this happens on a drive which is part of a RAID array where the information is synchronized between various different drives, the corrupted file shall be copied on all of the other drives and the harm will become long term. Many commonly used file systems either do not have real-time checks or don't have good ones which can detect a problem before the damage is done, so silent data corruption is a common matter on internet hosting servers where large amounts of data are stored.
No Data Corruption & Data Integrity in Cloud Hosting
We've dealt with the problem of silent data corruption on all our cloud hosting servers by using the hi-tech Z file system, or ZFS. The latter is better than other file systems because it is the only one on the market which checks all files in real time by using a checksum - a digital identifier that is unique for each file. When you upload content to your account, it will be stored on several SSD drives and constantly synced between them for redundancy. ZFS regularly analyzes the checksum of all files and if any file is detected as corrupted, it is replaced instantly 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 other SSDs. ZFS requires a lot of physical memory in order to carry out the real-time checks and the advantage of our cloud hosting platform is that we use 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 Hosting
We have avoided any probability of files getting damaged silently because the servers where your semi-dedicated hosting account will be created take advantage of a powerful file system known as ZFS. Its advantage over alternative file systems is that it uses a unique checksum for every single file - a digital fingerprint that is checked in real time. Since we save all content on a number of SSD drives, ZFS checks if the fingerprint of a file on one drive corresponds to the one on the other drives and the one it has stored. If there is a mismatch, the bad copy is replaced with a good one from one of the other drives and considering that it happens in real time, there's no chance that a corrupted copy could remain on our servers or that it could be duplicated to the other hard disks in the RAID. None of the other file systems employ such checks and what is more, even during a file system check right after an unexpected blackout, none of them will detect silently corrupted files. In contrast, ZFS won't crash after a blackout and the constant checksum monitoring makes a lenghty file system check obsolete.