RAID, or Redundant Array of Independent Disks, is a technology of keeping data on several hard disks that work together as one single logical unit. The drives could be physical or logical i.e. in the latter case one single drive is divided into separate ones through virtualization software. In either case, the same information is kept on all of the drives and the key benefit of employing 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 enhances the overall 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 drives are used, whether writing is carried out on all of the drives in real time or just on one, and how the data is synchronized between the drives - whether it is recorded in blocks on one drive after another or all of it is mirrored from one on the others. All of these factors mean that the fault tolerance and the performance between the different RAID types could differ.

RAID in Cloud Hosting

The SSD drives which our cutting-edge cloud web hosting platform uses for storage work in RAID-Z. This kind of RAID is created to work with the ZFS file system which runs on the platform and it takes advantage of the so-called parity disk - a specific drive where data stored on the other drives is copied with an extra bit added to it. In case one of the disks stops functioning, your sites will continue working from the other ones and after we replace the problematic one, the information which will be cloned on it will be recovered from what is stored on the remaining drives together with the info from the parity disk. This is done in order to be able to recalculate the bits of each and every file correctly and to authenticate the integrity of the information cloned on the new drive. This is one more level of security for the information that you upload to your cloud hosting account together with the ZFS file system that compares a special digital fingerprint for each and every file on all the drives in real time.

RAID in Semi-dedicated Servers

The SSD drives which are used for holding any content uploaded to the semi-dedicated server accounts that we provide work in RAID-Z. This is a special setup where one or more drives are used for parity i.e. the system will include an additional bit to any data cloned on this type of a hard 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 combination calculated between the data on the other drives and that on the parity one. This is done to guarantee that the information on the new drive will be accurate. During the procedure, the RAID will continue working adequately and the faulty drive won't affect the proper operation of your sites in any way. Working with SSDs in RAID-Z is an amazing addition to the ZFS file system that runs on our revolutionary cloud platform with regards to 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 extremely fast SSD drives that will raise the speed of your websites considerably. The hard disks work in RAID to ensure that you will not lose any info due to a power loss or a hardware malfunction. The production servers take advantage of a variety of drives where the info is stored and one disk is used for parity i.e. one bit is added to all information copied on it, that makes it much easier to restore the website content without any loss if a main drive stops working. If you take advantage of our backup service, your data will be kept on a separate machine that 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 of your content all the time. With this particular configuration your information will always be safe since it will be available on several drives.