RAID, or Redundant Array of Independent Disks, is a technology for saving data on several hard disks that operate together as one logical unit. The drives could be physical or logical i.e. in the latter case one drive is divided into independent ones via virtualization software. In either case, the very same data is saved on all the drives and the basic advantage of employing this type of a setup is that in case a drive stops working, the data will still be available on the other ones. Using a RAID also enhances the performance as the input and output operations will be spread among a few drives. There are several types of RAID based on how many hard disks are used, whether writing is done on all drives in real time or just on one, and how the data is synced between the drives - whether it's written in blocks on one drive after another or all of it is mirrored from one on the others. All of these factors indicate that the error tolerance as well as the performance between the various RAID types could differ.

RAID in Website Hosting

The SSD drives that our cutting-edge cloud Internet hosting platform employs for storage function in RAID-Z. This kind of RAID is intended 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 info stored on the other drives is cloned with an additional bit added to it. If one of the disks stops working, your sites shall continue working from the other ones and as soon as we replace the problematic one, the information which 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 performed in order to be able to recalculate the bits of each and every file properly and to authenticate the integrity of the info copied on the new drive. This is an additional level of security for the content which you upload to your website hosting account together with the ZFS file system that analyzes a unique digital fingerprint for each and every file on all the drives in real time.

RAID in Semi-dedicated Hosting

If you host your sites inside a semi-dedicated hosting account from our company, all the content which you upload will be stored on SSD drives which work in RAID-Z. With this type of RAID, at least 1 of the disks is used for parity - when data is synchronized between the hard drives, an additional bit is added to it on the parity one. The reasoning behind this is to ensure the integrity of the info which is duplicated to a brand new drive in case one of the disks in the RAID stops working since the content being copied on the brand new disk is recalculated from the info on the standard hard drives and on the parity one. Another advantage of RAID-Z is that even if a drive fails, the system could switch to another one right away without service disturbances of any type. RAID-Z adds an additional level of safety for the content which you upload on our cloud web hosting platform in addition to the ZFS file system which uses unique checksums to validate the integrity of each file.

RAID in VPS

In case you employ one of our virtual private server solutions, any content which you upload will be stored on SSD drives which operate in RAID. At least a single drive is employed for parity to guarantee the integrity of your info. In simple terms, this is a special drive where info is copied with one bit added to it. If a disk within the RAID fails, your websites will continue working and when a new disk takes the place of the faulty one, the bits of the information that will be cloned on it are calculated by using the healthy and the parity drives. That way, any probability of corrupting data throughout the process is prevented. We also use regular hard disk drives which operate in RAID for storing backup copies, so if you add this service to your VPS package, your site content will be stored on multiple drives and you'll never need to worry about its integrity even in the event of multiple drive failures.