RAID, or Redundant Array of Independent Disks, is a technology of storing data on several hard drives which work together as one single logical unit. The drives can be physical or logical i.e. in the second case one drive is split into independent ones using virtualization software. In any case, the same info is stored on all of the drives and the main benefit of using this type of a setup is that in case a drive fails, the data will remain available on the remaining ones. Having a RAID also enhances the performance since the input and output operations will be spread among a number of drives. There are several kinds of RAID dependant upon how many hard drives are used, whether writing is done on all drives in real time or just on one, and how the information is synchronized between the hard 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 fault tolerance as well as the performance between the different RAID types could differ.

RAID in Semi-dedicated Servers

The SSD drives that are used for keeping any content uploaded to the semi-dedicated server accounts that we offer operate in RAID-Z. This is a specific configuration where one or more hard drives are employed for parity i.e. the system will include an extra bit to any data duplicated on this kind of a hard drive. In the event that a disk fails and is substituted with a new one, what info will be cloned on the latter shall be a mix calculated between the data on the remaining hard disks and that on the parity one. This is done to make sure that the information on the new drive shall be accurate. Throughout the procedure, the RAID will continue working normally and the problematic drive won't have an impact on the proper operation of your websites in any way. Working with SSDs in RAID-Z is an outstanding addition to the ZFS file system which runs on our state-of-the-art cloud platform with regard to preserving the integrity of your files because ZFS uses specific digital identifiers identified as checksums so as to prevent silent data corruption.

RAID in VPS Servers

The physical servers where we make VPS server work with extremely fast SSD drives which will increase the speed of your websites noticeably. The disk drives function in RAID to ensure that you will not lose any information as a result of a power loss or a hardware failure. The production servers take advantage of a variety of drives where the information is kept and one disk is used for parity i.e. one bit is added to all of the info copied on it, which makes it easier to restore the site content without loss in case a main drive fails. If you use our backup service, the data will be stored on an independent machine which uses standard hard-disk drives and even though there is no parity one in this case, they are also in a RAID to make sure that we will have a backup of your content at all times. With this setup your info will always be safe as it will be available on a lot of disk drives.