RAID, or Redundant Array of Independent Disks, is a technology of storing data on several hard disk drives which work together as one single logical unit. The drives could be physical or logical i.e. in the aforementioned case one drive is split into independent ones through virtualization software. In any case, the same data is saved on all of the drives and the key advantage of employing this kind of a setup is that in case a drive breaks down, the data shall still be available on the remaining ones. Having a RAID also enhances the performance as the input and output operations will be spread among a couple of drives. There are several kinds of RAID depending 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 info is synced between the drives - whether it's written in blocks on one drive after another or it is mirrored from one on the others. All these factors suggest that the fault tolerance and the performance between the various RAID types may vary.

RAID in Hosting

The SSD drives which our cutting-edge cloud Internet hosting platform uses for storage work in RAID-Z. This type of RAID is developed to work with the ZFS file system that runs on the platform and it works by using the so-called parity disk - a specific drive where data kept on the other drives is cloned with an additional bit added to it. If one of the disks fails, your websites will continue working from the other ones and as soon as we replace the bad one, the info that will be duplicated on it will be rebuilt from what is stored on the remaining drives along with the info from the parity disk. This is done so as to be able to recalculate the bits of every single file adequately and to confirm the integrity of the data cloned on the new drive. This is one more level of security for the information you upload to your hosting account in addition to the ZFS file system that compares a unique digital fingerprint for each and every file on all hard drives in real time.

RAID in Semi-dedicated Servers

The SSD drives which are used for keeping any site content uploaded to the semi-dedicated server accounts which we offer operate in RAID-Z. This is a special setup where one or more disk drives are used for parity i.e. the system will include an additional bit to any data copied on this kind of a drive. In case that a disk fails and is substituted with another one, what info will be duplicated on the latter shall be a mix calculated between the data on the other disks and that on the parity one. This is done to ensure that the info on the new drive will be accurate. Throughout the procedure, the RAID will continue operating normally and the problematic drive will not impact the proper operation of your sites in any respect. Using SSDs in RAID-Z is an impressive addition to the ZFS file system which runs on our advanced cloud platform in terms of preserving the integrity of your files since ZFS uses specific digital identifiers identified as checksums so as to prevent silent data corruption.

RAID in VPS Servers

The physical servers where we create VPS server work with fast SSD drives that will increase the speed of your Internet sites significantly. The hard disks work in RAID to make sure that you won't lose any data due to a power loss or a hardware failure. The production servers employ a variety of drives where the data is kept and one disk is used for parity i.e. one bit is added to all info copied on it, that makes it easier to recover the website content without loss if a main drive stops working. If you choose our backup service, the info will be saved on an individual machine which uses standard hard-disk drives and even though there's no parity one in this case, they are also in a RAID to make sure that we will have a backup of your website content at all times. With this configuration your information will always be safe since it will be available on several drives.