Data corruption is the unintended modification of a file or the loss of info which often occurs during reading or writing. The reason can be hardware or software fail, and because of this, a file may become partially or fully corrupted, so it will no longer function correctly as its bits will be scrambled or missing. An image file, for instance, will no longer show a real image, but a random combination of colors, an archive will be impossible to unpack since its content will be unreadable, etc. In the event that such a problem occurs and it is not identified by the system or by an administrator, the data will get corrupted silently and when this happens on a disk drive that is part of a RAID array where the data is synced between different drives, the corrupted file shall be reproduced on all the other drives and the damage will be permanent. Many popular file systems either don't feature real-time checks or don't have high quality ones that will detect an issue before the damage is done, so silent data corruption is a common issue on hosting servers where huge amounts of info are stored.
No Data Corruption & Data Integrity in Shared Website Hosting
We've dealt with the matter of silent data corruption on all our shared website hosting servers by using the hi-tech Z file system, or ZFS. The latter is superior to other file systems as it is the only one out there that checks all of the files immediately by using a checksum - a digital identifier that is unique for each and every file. When you upload content to your account, it will be stored on several SSD drives and frequently synchronized between them for redundancy. ZFS constantly examines the checksum of all files and in the event that any file is detected as corrupted, it is replaced quickly with a good copy from another disk. As this happens in real time, there is no risk that a corrupted file may remain or may be duplicated on the other SSDs. ZFS requires lots of physical memory to carry out the real-time checks and the advantage of our cloud website hosting platform is that we use multiple powerful servers working together. In case you host your sites with us, your information will be undamaged no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Hosting
Your semi-dedicated hosting account will be protected against silent data corruption since all of our storage servers work with the efficient ZFS file system. What makes the latter unique is that it uses checksums, or digital identifiers, in order to verify the integrity of each and every file. When you upload content to your account, it'll be saved on a couple of redundant drives working in a RAID i.e. the files will be the same on all disks. All copies of a particular file will have the same checksum on all hard drives and ZFS will compare the checksums of the duplicates in real time, so if it detects a mismatch, which would indicate that one of the copies is damaged, it'll substitute that file with a good copy from one of the other disks. Even if there's an unforeseen power failure, the data on the servers won't get corrupted and there will not be any need for a time-consuming system check that other file systems perform after some malfunction, prolonging the time needed for the server to go back online. ZFS is the sole file system that can truly protect your content from silent data corruption.