RAID, or Redundant Array of Independent Disks, is a technology of saving data on a number hard disk drives which function together as a single logical unit. The drives can be physical or logical i.e. in the aforementioned case one single drive is split into separate ones via virtualization software. In any case, identical information is saved on all drives and the basic benefit of using such a setup is that in case a drive fails, the data will remain available on the other ones. Using a RAID also boosts the performance as the input and output operations will be spread among a number of drives. There are several kinds of RAID dependant upon how many hard disks are used, whether writing is performed on all drives in real time or just on one, and how the information is synced between the hard 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 suggest that the fault tolerance as well as the performance between the different RAID types may vary.

RAID in Shared Hosting

The SSD drives which our cutting-edge cloud web hosting platform employs for storage work in RAID-Z. This type of RAID is intended to work with the ZFS file system that runs on the platform and it employs the so-called parity disk - a specific drive where info located on the other drives is copied with an additional bit added to it. In case one of the disks fails, your sites will continue working from the other ones and after we replace the problematic one, the information which will be copied on it will be rebuilt from what is stored on the other drives together with the info from the parity disk. This is performed so as to be able to recalculate the bits of each file adequately and to validate the integrity of the data duplicated on the new drive. This is an additional level of security for the info which you upload to your shared hosting account together with the ZFS file system which analyzes a unique digital fingerprint for every single file on all of the hard drives in real time.

RAID in Semi-dedicated Servers

The SSD drives which are used for saving any content uploaded to the semi-dedicated server accounts which we provide operate in RAID-Z. This is a special setup where one or more disk drives are employed for parity i.e. the system will add an additional bit to any data duplicated on such a disk drive. In the event that a disk fails and is substituted with another one, what data will be cloned on the latter will be a mix calculated between the data on the remaining drives and that on the parity one. This is done to make sure that the data on the new drive will be correct. During the procedure, the RAID will continue working normally and the faulty drive won't affect the normal operation of your sites in any respect. Using SSDs in RAID-Z is a fantastic addition to the ZFS file system which runs on our state-of-the-art cloud platform with regards to preserving the integrity of your files as ZFS uses special digital identifiers named checksums so as to prevent silent data corruption.

RAID in VPS Servers

The physical servers where we generate VPS server work with quick SSD drives that will raise the speed of your websites considerably. The hard disks function in RAID to make sure that you will not lose any information as a result of a power loss or a hardware breakdown. The production servers work with multiple drives where the data is kept and one disk is used for parity i.e. one bit is added to all the info copied on it, which makes it easier to recover the site content without loss in the event a main drive stops working. In case you use our backup service, your information will be kept on an independent machine which uses standard hard-disk drives and despite the fact that there is no parity one in this case, they are also in a RAID to guarantee that we will have a backup copy of your content all the time. With this setup your info will always be safe because it will be available on many drives.