RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that makes it possible for a system to use several hard drives as a single logical unit. To put it differently, all the drives are used as one and the data on all of them is the same. This kind of a setup has 2 key advantages over using just a single drive to save data - the first is redundancy, so if one drive doesn't work, the info will be accessible through the others, and the second is improved performance since the input/output, or reading/writing operations will be distributed among several drives. You can find different RAID types based on what amount of drives are used, if reading and writing are both performed from all drives simultaneously, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. Determined by the exact setup, the fault tolerance and the performance may differ.
RAID in Cloud Hosting
Any content which you upload to your new cloud hosting account will be stored on quick SSD drives which work in RAID-Z. This configuration is built to use the ZFS file system which runs on our cloud Internet hosting platform and it adds one more level of protection for your site content on top of the real-time checksum authentication that ZFS uses to guarantee the integrity of the data. With RAID-Z, the information is saved on a couple of disks and at least 1 is a parity disk - whenever info is recorded on it, an additional bit is added, so if any drive fails for some reason, the stability of the information can be verified by recalculating its bits in accordance with what is saved on the production drives and on the parity one. With RAID-Z, the functioning of our system will not be interrupted and it will continue working efficiently until the faulty drive is changed and the information is synchronized on it.