RAID, or Redundant Array of Independent Disks, is a technology of keeping data on several hard disks which function together as a single logical unit. The drives can be physical or logical i.e. in the second case one single drive is split into different ones via virtualization software. Either way, the same information is stored on all drives and the main advantage of employing such a setup is that if a drive fails, the data shall still be available on the remaining ones. Employing a RAID also improves the overall performance as the input and output operations will be spread among several drives. There are several kinds of RAID depending on how many drives are used, whether writing is carried out on all the drives in real time or just on a single one, and how the data is synchronized 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 these factors imply that the fault tolerance as well as the performance between the various RAID types can differ.

RAID in Shared Web Hosting

The revolutionary cloud hosting platform where all shared web hosting accounts are made uses quick SSD drives as an alternative to the classic HDDs, and they work in RAID-Z. With this setup, a number of hard disks operate together and at least a single one is a dedicated parity disk. Put simply, when data is written on the remaining drives, it's cloned on the parity one adding an extra bit. This is done for redundancy as even in case a drive fails or falls out of the RAID for whatever reason, the information can be rebuilt and verified thanks to the parity disk and the data recorded on the other ones, so not a thing will be lost and there won't be any service disturbances. This is an additional level of protection for your data together with the revolutionary ZFS file system which uses checksums to ensure that all data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Servers

The RAID type that we employ for the cloud hosting platform where your semi-dedicated server account will be created is called RAID-Z. What's different about it is that at least one of the disks is employed as a parity drive. Put simply, whenever any data is cloned on this specific disk drive, one more bit is included to it and in case a faulty disk is changed, the data that will be copied on it is a combination of the data on the other hard drives in the RAID and that on the parity one. We do this to guarantee that your info is intact. During this process, your websites will be working normally because RAID-Z makes it possible for an entire drive to fail without causing any service disruptions and it simply uses one of the remaining ones as the main production drive. Using RAID-Z together with the ZFS file system which uses checksums to ensure that no data can get silently corrupted on our servers, you'll never have to worry about the integrity of your files.

RAID in VPS Servers

The SSD drives which we use on the machines where we set up VPS servers function in RAID to ensure that any content you upload will be available and intact at all times. At least a single drive is employed for parity - one bit of data is added to any data copied on it. In the event that a main drive stops working, it is replaced and the data which will be cloned on it is calculated between the rest of the drives and the parity one. That’s done to ensure that the correct info is copied and that not a single file is corrupted because the new drive will be included in the RAID afterwards. We also use hard disks working in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you'll use an even more reliable web hosting service since your content will be available on multiple drives regardless of any sort of unforeseen hardware malfunction.