RAID, or Redundant Array of Independent Disks, is a technology for saving data on several hard drives that operate together as a single logical unit. The drives could be physical or logical i.e. in the second case one single drive is split into independent ones via virtualization software. Either way, identical data is kept on all of the drives and the main advantage of using this type of a setup is that if a drive stops working, the data will still be available on the remaining ones. Employing a RAID also improves the overall performance as the input and output operations will be spread among a couple of drives. There are several types of RAID dependant upon 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 info is synced between the drives - whether it is written in blocks on one drive after another or all of it is mirrored from one on the others. All of these factors indicate that the fault tolerance as well as the performance between the different RAID types may differ.

RAID in Cloud Web Hosting

The state-of-the-art cloud Internet hosting platform where all cloud web hosting accounts are made uses super fast SSD drives rather than the standard HDDs, and they function in RAID-Z. With this configuration, multiple hard disk drives operate together and at least one of them is a dedicated parity disk. Basically, when data is written on the other drives, it's duplicated 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 thanks to the parity disk and the data saved on the other ones, thus nothing will be lost and there will not be any service disorders. This is an additional level of security for your info in addition to the advanced ZFS file system that uses checksums to make sure that all data on our servers is undamaged and is not silently corrupted.

RAID in Semi-dedicated Hosting

In case you host your Internet sites within a semi-dedicated hosting account from our company, any content which you upload will be stored on SSD drives that work in RAID-Z. With this kind of RAID, at least 1 of the hard disks is used for parity - when data is synced between the disks, an extra bit is added to it on the parity one. The purpose behind this is to ensure the integrity of the data which is duplicated to a brand new drive if one of the disks in the RAID fails as the site content being copied on the new disk is recalculated from the data on the standard hard drives and on the parity one. An additional advantage of RAID-Z is that even if a disk drive stops working, the system could switch to a different one instantly without service disturbances of any sort. RAID-Z adds one more level of safety for the content that you upload on our cloud web hosting platform in addition to the ZFS file system that uses unique checksums in order to authenticate the integrity of each file.

RAID in VPS Web Hosting

The physical servers where we make virtual private server use super fast SSD drives which will boost the speed of your websites considerably. The drives operate in RAID to make sure that you won't lose any data as a result of a power loss or a hardware malfunction. The production servers use a variety of drives where the information is stored and one disk is used for parity i.e. one bit is added to all information copied on it, which makes it easier to restore the content without any loss if a main drive stops working. If you use our backup service, your data will be stored on a separate machine which uses standard hard-disk drives and although there's no parity one in this case, they are also in a RAID to guarantee that we will have a backup copy of your site content all the time. With this type of configuration your data will always be safe because it will be available on multiple drives.