RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which enables a system to take advantage of multiple hard drives as one single logical unit. In other words, all the drives are used as one and the data on all of them is the same. This type of a setup has 2 key advantages over using a single drive to store data - the first is redundancy, so in the event that one drive breaks down, the info will be accessed from the remaining ones, and the second one is improved performance as the input/output, or reading/writing operations will be distributed among a number of drives. There are different RAID types in accordance with how many drives are employed, 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, etc. Depending on the particular setup, the fault tolerance and the performance may vary.

RAID in Cloud Web Hosting

The hard disks that we employ for storage with our outstanding cloud Internet hosting platform are not the standard HDDs, but super fast solid-state drives (SSD). They function in RAID-Z - a special setup developed for the ZFS file system that we work with. All of the content that you upload to your cloud web hosting account will be held on multiple hard drives and at least 1 shall be employed as a parity disk. This is a specific drive where an extra bit is added to any content copied on it. If a disk in the RAID stops functioning, it will be changed without service disturbances and the info will be rebuilt on the new drive by recalculating its bits thanks to the data on the parity disk along with that on the other disks. This is done in order to guarantee the integrity of the data and together with the real-time checksum authentication that the ZFS file system executes on all drives, you'll never have to concern yourself with the loss of any info no matter what.