RAID, or Redundant Array of Independent Disks, is a technology for keeping data on several hard disks which function together as a single logical unit. The drives could be physical or logical i.e. in the second case a single drive is divided into separate ones via virtualization software. In any case, the same information is saved on all drives and the main benefit of using such a setup is that in the event that a drive fails, the data will remain available on the remaining ones. Employing a RAID also boosts the performance because the input and output operations will be spread among a number of drives. There are several types of RAID based on how many hard drives are used, whether writing is carried out on all the drives in real time or just on one, and how the data is synced between the drives - whether it is written in blocks on one drive after another or it is mirrored from one on the others. All these factors imply that the error tolerance as well as the performance between the different RAID types may vary.

RAID in Cloud Hosting

The advanced cloud hosting platform where all cloud hosting accounts are generated uses super fast SSD drives as an alternative to the traditional HDDs, and they operate in RAID-Z. With this setup, numerous hard disk drives operate together and at least one is a dedicated parity disk. Put simply, 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 information can be rebuilt and verified using the parity disk and the data saved on the other ones, therefore nothing will be lost and there will not be any service disturbances. This is one more level of protection for your information in addition to the advanced ZFS file system that uses checksums to ensure that all the data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Servers

The data uploaded to any semi-dedicated server account is stored on SSD drives that work in RAID-Z. One of the drives in this kind of a setup is used for parity - whenever data is cloned on it, an extra bit is added. In case a disk happens to be defective, it will be taken out of the RAID without disturbing the work of the Internet sites because the data will load from the remaining drives, and when a new drive is added, the information which will be copied on it will be a combination between the data on the parity disk and data kept on the other hard disks in the RAID. That is done to guarantee that the info which is being cloned is accurate, so the moment the new drive is rebuilt, it can be integrated into the RAID as a production one. This is one more warranty for the integrity of your data since the ZFS file system which runs on our cloud hosting platform compares a unique checksum of all the copies of the files on the various drives so as to avoid any probability of silent data corruption.

RAID in VPS Servers

If you employ one of our VPS server plans, any content you upload will be stored on SSD drives that function in RAID. At least a single drive is employed for parity so as to ensure the integrity of the data. 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 breaks down, your websites will continue working and when a new disk replaces the flawed one, the bits of the information that will be copied on it are calculated by using the healthy and the parity drives. That way, any possibility of corrupting data throughout the process is avoided. We also employ conventional hard drives that work in RAID for storing backup copies, so if you add this service to your VPS package, your 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.