Redundant Array of Independent Disks, or RAID, is a method of keeping content on a number of hard disk drives simultaneously. A RAID could be software or hardware based on the drives that are used - physical or logical ones, but what’s common between them is that they all function as just one single unit where data is kept. The main advantage of using a RAID is redundancy as the information on all drives shall be exactly the same at all times, so even in case a drive fails for whatever reason, the data will still be available on the remaining drives. The overall performance is also enhanced because the reading and writing processes can be split between various drives, so a single one will not be overloaded. There're different kinds of RAIDs where the effectiveness and fault tolerance may vary according to the exact setup - whether information is written on all drives real-time or it's written on one drive and afterwards mirrored on another, what amount of drives are used for the RAID, etcetera.
RAID in Cloud Website Hosting
The drives that we employ for storage with our innovative cloud Internet hosting platform are not the standard HDDs, but extremely fast solid-state drives (SSD). They operate in RAID-Z - a special setup intended for the ZFS file system that we work with. Any content that you add to the cloud website hosting account will be stored on multiple drives and at least one will be employed as a parity disk. This is a specific drive where a further bit is included to any content copied on it. In the event that a disk in the RAID fails, it'll be replaced with no service disruptions and the info will be recovered on the new drive by recalculating its bits thanks to the data on the parity disk along with that on the remaining disks. This is done to ensure the integrity of the data and along with the real-time checksum authentication that the ZFS file system runs on all drives, you will never have to be concerned about losing any data no matter what.