RAID, or Redundant Array of Independent Disks, is a technology for keeping data on a number hard disk drives that function together as a single logical unit. The drives can be physical or logical i.e. in the second case a single drive is divided into individual ones using virtualization software. In either case, identical information is stored on all of the drives and the key benefit of using such a setup is that if a drive breaks down, the data shall still be available on the remaining ones. Employing a RAID also enhances the performance as the input and output operations will be spread among several drives. There are several kinds of RAID dependant upon how many hard drives are used, whether writing is carried out on all drives in real time or just on a single one, and how the information is synced between the drives - whether it's recorded in blocks on one drive after another or all of it is mirrored from one on the others. All these factors show that the fault tolerance as well as the performance between the various RAID types could differ.
RAID in VPS Web Hosting
In case you take advantage of one of our virtual private server plans, any content which you upload will be kept on SSD drives which operate in RAID. At least 1 drive is employed for parity to guarantee the integrity of the data. In simple terms, this is a special drive where info is copied with one bit added to it. If a disk within the RAID stops working, your sites will continue working and when a new disk substitutes the malfunctioning one, the bits of the data that will be copied on it are calculated by using the healthy and the parity drives. That way, any chance of corrupting data during the process is prevented. We also employ regular hard drives which operate in RAID for storing backup copies, so in case you add this service to your VPS plan, your content will be kept on multiple drives and you won't ever have to worry about its integrity even in the event of multiple drive failures.