RAID, or Redundant Array of Independent Disks, is a technology of storing data on a number hard drives that function together as one single logical unit. The drives could be physical or logical i.e. in the latter case one drive is divided into independent ones via virtualization software. In either case, the very same info is stored on all the drives and the main advantage of employing this kind of a setup is that in case a drive stops working, the data will still be available on the remaining ones. Having a RAID also enhances the performance since the input and output operations will be spread among a couple of drives. There are several kinds of RAID dependant upon how many hard disks are used, whether writing is carried out on all the drives in real time or just on one, and how the data is synchronized between the drives - whether it's written in blocks on one drive after another or it is mirrored from one on the others. All these factors indicate that the fault tolerance and the performance between the different RAID types can vary.
RAID in Semi-dedicated Hosting
The NVMe drives that are used for saving any site content uploaded to the semi-dedicated hosting accounts that we offer function in RAID-Z. This is a specific setup where one or more drives are used for parity i.e. the system will include an extra bit to any data duplicated on this type of a disk drive. In the event that a disk fails and is replaced with a new one, what info will be copied on the latter will be a combination calculated between the data on the other disks and that on the parity one. This is done to guarantee that the information on the new drive will be accurate. Throughout the procedure, the RAID will continue functioning normally and the malfunctioning drive will not have an effect on the proper operation of your websites in any way. Working with NVMes in RAID-Z is an outstanding addition to the ZFS file system which runs on our revolutionary cloud platform in terms of preserving the integrity of your files because ZFS uses special digital identifiers named checksums to avoid silent data corruption.