Redundant Array of Independent Disks, or RAID, is a method of keeping content on several hard drives concurrently. A RAID might be software or hardware depending on the HDDs which are used - physical or logical ones, but what’s common between them is the fact that they all operate as just one single unit where data is saved. The main advantage of using a RAID is redundancy as the data on all the drives is exactly the same all the time, so even in the event that some drive fails for whatever reason, the info will still be available on the other drives. The overall performance is also better as the reading and writing processes can be split between a number of drives, so a single one will not be overloaded. There are different sorts of RAIDs where the effectiveness and fault tolerance may vary according to the specific setup - whether information 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 Cloud Website Hosting
The revolutionary cloud web hosting platform where all cloud website hosting accounts are made employs quick SSD drives as an alternative to the traditional HDDs, and they function in RAID-Z. With this configuration, a number of hard disks operate together and at least 1 is a dedicated parity disk. Basically, when data is written on the rest of the drives, it's copied on the parity one adding an extra bit. This is done for redundancy as even in case some drive fails or falls out of the RAID for whatever reason, the data can be rebuilt and verified thanks to the parity disk and the data saved on the other ones, thus nothing will be lost and there will be no service disturbances. This is another level of protection for your information along with the revolutionary ZFS file system that uses checksums to ensure that all data on our servers is undamaged and is not silently corrupted.