Redundant Array of Independent Disks, or RAID, is a way of keeping content on multiple hard disk drives simultaneously. A RAID could be software or hardware depending on the hard drives which are used - physical or logical ones, however what is common between them is that they all operate as just one single unit where information is saved. The top advantage of using a RAID is redundancy because the info on all the drives shall be identical at all times, so even if a drive fails for whatever reason, the data will still be present on the remaining drives. The overall performance is also better as the reading and writing processes could be split between different drives, so a single one will never be overloaded. There are different sorts of RAIDs where the performance and fault tolerance may vary based on the particular setup - whether your data is written on all of the drives real-time or it's written on one drive and afterwards mirrored on another, what amount of drives are used for the RAID, and many others.
RAID in VPS Servers
If you use one of our VPS server packages, any content which you upload will be kept on SSD drives that work in RAID. At least one drive is employed for parity to guarantee the integrity of your info. In simple terms, this is a special drive where information is copied with one bit added to it. In case a disk within the RAID stops working, your websites will continue working and when a new disk substitutes the flawed one, the bits of the data that will be cloned on it are calculated by using the healthy and the parity drives. By doing this, any possibility of corrupting data throughout the process is avoided. We also use ordinary hard drives which operate in RAID for storing backups, so in case you add this service to your VPS plan, your website content will be stored on multiple drives and you won't ever need to worry about its integrity even in the event of multiple drive breakdowns.