RAID, or Redundant Array of Independent Disks, is a technology for storing data on a number hard disk drives which function together as one single logical unit. The drives could be physical or logical i.e. in the latter case one single drive is split into different ones via virtualization software. In any case, identical information is saved on all of the drives and the basic advantage of employing this type of a setup is that if a drive fails, the data will still be available on the other ones. Using a RAID also enhances the overall performance as the input and output operations will be spread among several drives. There are several types of RAID based on 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 hard drives - whether it is recorded in blocks on one drive after another or it is mirrored from one on the others. These factors mean that the fault tolerance as well as the performance between the different RAID types can differ.

RAID in Web Hosting

The SSD drives that our cutting-edge cloud Internet hosting platform uses for storage operate in RAID-Z. This kind of RAID is designed to work with the ZFS file system that runs on the platform and it takes advantage of the so-called parity disk - a specific drive where information saved on the other drives is cloned with an extra bit added to it. In the event that one of the disks stops working, your Internet sites will continue working from the other ones and once we replace the faulty one, the info 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 elements of each file properly and to validate the integrity of the data copied on the new drive. This is one more level of security for the information you upload to your web hosting account together with the ZFS file system which compares a unique digital fingerprint for every single file on all of the hard drives in real time.

RAID in Semi-dedicated Hosting

The SSD drives which are used for keeping any content uploaded to the semi-dedicated hosting accounts which we offer work in RAID-Z. This is a specific setup where one or more drives are employed for parity i.e. the system will add an extra bit to any data cloned on such a drive. In case that a disk fails and is replaced with another one, what data will be copied on the latter shall be a mix calculated between the data on the other hard disks and that on the parity one. This is done to guarantee that the info on the new drive shall be accurate. Throughout the process, the RAID will continue working adequately and the faulty drive will not have an effect on the adequate operation of your websites in any way. Working with SSDs in RAID-Z is an impressive addition to the ZFS file system which runs on our top-notch cloud platform in terms of preserving the integrity of your files since ZFS uses specific digital identifiers referred to as checksums in order to avoid silent data corruption.

RAID in VPS Web Hosting

The SSD drives which we use on the physical machines where we create virtual private servers function in RAID to make sure that any content which you upload will be available and intact all the time. At least 1 drive is used for parity - one bit of info is added to any data cloned on it. In the event that a main drive breaks down, it is changed and the information that will be copied on it is calculated between the rest of the drives and the parity one. This is done to make sure that the right information is copied and that not a single file is corrupted because the new drive will be used in the RAID afterwards. In addition, we use hard disks functioning in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you will use an even more reliable Internet hosting service since your content will be available on multiple drives regardless of any sort of unexpected hardware failure.