RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard drives that function together as one single logical unit. The drives could be physical or logical i.e. in the latter case a single drive is divided into different ones via virtualization software. In either case, identical information is saved on all the drives and the basic advantage of using this kind of a setup is that in the event that a drive breaks down, the data will remain available on the other ones. Employing a RAID also boosts the overall performance as the input and output operations will be spread among a couple of drives. There are several kinds of RAID based on how many hard disks are used, whether writing is carried out on all drives in real time or just on a single one, and how the info is synchronized between the drives - whether it's recorded in blocks on one drive after another or it is mirrored from one on the others. All of these factors mean that the error tolerance and the performance between the different RAID types may differ.

RAID in Cloud Hosting

Any content which you upload to your new cloud hosting account will be placed on fast SSD drives that function in RAID-Z. This setup is built to use the ZFS file system that runs on our cloud Internet hosting platform and it adds another level of protection for your website content on top of the real-time checksum validation which ZFS uses to guarantee the integrity of the data. With RAID-Z, the data is stored on several disks and at least one of them is a parity disk - whenever info is recorded on it, an extra bit is added, so if any drive fails for whatever reason, the integrity of the data can be verified by recalculating its bits based on what is saved on the production drives and on the parity one. With RAID-Z, the operation of our system will not be interrupted and it will continue operating effectively until the faulty drive is replaced and the info is synchronized on it.

RAID in Semi-dedicated Hosting

The SSD drives which are used for saving any content uploaded to the semi-dedicated hosting accounts which we provide operate in RAID-Z. This is a special setup where one or more hard drives are employed for parity i.e. the system will include an additional bit to any data cloned on this kind of a drive. If a disk fails and is replaced with a new one, what info will be cloned on the latter shall be a combination calculated between the data on the other hard disks and that on the parity one. This is done to make sure that the data on the new drive will be accurate. Throughout the procedure, the RAID will continue operating normally and the problematic drive will not have an impact on the proper operation of your sites in any way. Working with SSDs in RAID-Z is a fantastic addition to the ZFS file system that runs on our state-of-the-art cloud platform with regard to preserving the integrity of your files as ZFS uses unique digital identifiers known as checksums so as to avoid silent data corruption.


If you employ one of our virtual private server packages, any content that you upload will be saved on SSD drives which operate in RAID. At least a single drive is used for parity to guarantee the integrity of your information. In simple terms, this is a special drive where info is copied with one bit added to it. If a disk within the RAID stops functioning, your websites will continue working and when a new disk substitutes the flawed one, the bits of the info that will be copied on it are calculated by using the healthy and the parity drives. By doing this, any chance of corrupting data throughout the process is avoided. We also use standard hard drives that operate in RAID for storing backup copies, so if you add this service to your VPS package, your website content will be stored on multiple drives and you won't ever have to worry about its integrity even in the event of multiple drive breakdowns.