RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which allows a system to employ 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 type of a configuration has 2 huge advantages over using a single drive to store data - the first is redundancy, so if one drive breaks down, the data will be accessible through the others, and the second is better performance because the input/output, or reading/writing operations will be distributed among different drives. There're different RAID types depending on how many drives are employed, if reading and writing are both performed from all of the drives simultaneously, if data is written in blocks on one drive after another or is mirrored between drives in the same time, etc. Determined by the particular setup, the error tolerance and the performance may vary.
RAID in Web Hosting
The state-of-the-art cloud hosting platform where all web hosting accounts are created uses fast NVMe drives as an alternative to the classic HDDs, and they work in RAID-Z. With this setup, numerous hard disk drives work together and at least one is a dedicated parity disk. In simple terms, when data is written on the remaining drives, it is copied on the parity one adding an extra bit. This is carried out for redundancy as even if some drive fails or falls out of the RAID for whatever reason, the data can be rebuilt and verified using the parity disk and the data stored on the other ones, therefore nothing will be lost and there will not be any service disturbances. This is another level of protection for your information together with the cutting-edge ZFS file system that uses checksums to make sure that all data on our servers is intact and is not silently corrupted.
RAID in Semi-dedicated Servers
In case you host your sites inside a semi-dedicated server account from our company, all the content which you upload will be held on NVMe drives which work in RAID-Z. With this form of RAID, at least 1 of the drives is employed for parity - when data is synced between the drives, an additional bit is included in it on the parity one. The purpose behind this is to ensure the integrity of the information that is duplicated to a new drive in the event that one of the drives in the RAID fails because the content being copied on the new disk is recalculated from the information on the standard hard drives and on the parity one. Another advantage of RAID-Z is the fact that even if a hard drive stops working, the system can switch to another one immediately without service disturbances of any type. RAID-Z adds an extra level of protection for the content that you upload on our cloud web hosting platform along with the ZFS file system which uses unique checksums to validate the integrity of each file.
RAID in VPS Servers
In case you employ one of our VPS server packages, any content you upload will be stored on NVMe drives which function in RAID. At least a single drive is employed for parity so as to guarantee the integrity of your information. In simple terms, this is a special drive where information is copied with one bit added to it. In the event that a disk in the RAID stops functioning, your Internet sites will continue working and when a new disk substitutes the defective one, the bits of the data that will be cloned on it are calculated by using the healthy and the parity drives. By doing this, any potential for corrupting data throughout the process is averted. We also employ regular hard disk drives which operate in RAID for storing backups, so should you include this service to your VPS package, your website content will be kept on multiple drives and you won't ever have to worry about its integrity even in the event of multiple drive failures.