RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which enables a system to use a number of hard drives as a single logical unit. Put simply, all drives are used as one and the info on all of them is identical. This type of a configuration has 2 key advantages over using a single drive to store data - the first one is redundancy, so if one drive breaks down, the information will be accessed through the remaining ones, and the second one is improved performance since the input/output, or reading/writing operations will be distributed among different drives. You can find different RAID types based on what number of drives are employed, if reading and writing are both executed from all the drives at the same time, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. According to the particular setup, the fault tolerance and the performance could differ.
RAID in Cloud Website Hosting
Our revolutionary cloud web hosting platform where all cloud website hosting accounts are generated employs fast SSD drives instead of the standard HDDs, and they work in RAID-Z. With this setup, multiple hard disk drives work together and at least 1 is a dedicated parity disk. Put simply, when data is written on the other drives, it is duplicated on the parity one adding an extra bit. This is carried out for redundancy as even in case a drive fails or falls out of the RAID for some reason, the information can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, thus practically nothing will be lost and there will not be any service disorders. This is another level of security for your data together with the advanced ZFS file system that uses checksums to ensure that all of the data on our servers is intact and is not silently corrupted.