RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard disks that operate together as one logical unit. The drives could be physical or logical i.e. in the second case one drive is split into different ones through virtualization software. In any case, exactly the same data is stored on all of the drives and the basic benefit of employing such a setup is that if a drive fails, the data shall still be available on the remaining ones. Having a RAID also boosts the overall performance since the input and output operations will be spread among a number of drives. There are several kinds of RAID based on how many hard drives are used, whether writing is carried out on all of the drives in real time or just on a single one, and how the data is synced between the drives - whether it's recorded in blocks on one drive after another or it is mirrored from one on the others. These factors imply that the fault tolerance and the performance between the different RAID types can vary.
RAID in Cloud Hosting
The state-of-the-art cloud hosting platform where all cloud hosting accounts are created uses fast NVMe drives rather than the standard HDDs, and they work in RAID-Z. With this configuration, a number of hard disks work together and at least one of them is a dedicated parity disk. In simple terms, when data is written on the remaining drives, it is cloned on the parity one adding an extra bit. This is carried out for redundancy as even if a drive fails or falls out of the RAID for whatever reason, the info can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, which means that not a thing will be lost and there won't be any service disturbances. This is another level of protection for your info together with the cutting-edge ZFS file system that uses checksums to ensure that all of the data on our servers is undamaged and is not silently corrupted.
RAID in Semi-dedicated Hosting
In case you host your sites inside a semi-dedicated hosting account from our firm, any content that you upload will be kept on NVMe drives which operate in RAID-Z. With this kind of RAID, at least 1 of the disks is used for parity - when data is synced between the drives, an extra bit is added to it on the parity one. The purpose behind this is to ensure the integrity of the information which is cloned to a new drive in the event that one of the drives in the RAID fails as the website content being copied on the new disk is recalculated from the info on the standard disk drives and on the parity one. Another advantage of RAID-Z is the fact that even in the event that a disk drive fails, the system can easily switch to a different one quickly without service disturbances of any type. RAID-Z adds one more level of security for the content you upload on our cloud Internet hosting platform along with the ZFS file system which uses unique checksums to verify the integrity of each file.
RAID in VPS Hosting
If you use one of our virtual private server solutions, any content that you upload will be saved on NVMe drives that work in RAID. At least 1 drive is used for parity so as to guarantee the integrity of the data. In simple terms, this is a special drive where data is copied with one bit added to it. In the event that a disk within the RAID stops working, your Internet sites will continue working and when a new disk takes the place of the malfunctioning one, the bits of the information that will be cloned on it are calculated by using the healthy and the parity drives. By doing this, any possibility of corrupting data during the process is averted. We also employ conventional hard disks which function in RAID for storing backup copies, so if you add this service to your VPS plan, your website content will be stored on multiple drives and you won't ever have to worry about its integrity even in the event of multiple drive failures.