RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard disk drives which operate together as a single logical unit. The drives can be physical or logical i.e. in the aforementioned case one drive is divided into independent ones through virtualization software. In either case, exactly the same information is stored on all the drives and the basic benefit of using such a setup is that in the event that a drive stops working, the data will remain available on the remaining ones. Having a RAID also enhances the overall performance since the input and output operations will be spread among a number of drives. There are several types of RAID depending on how many hard disks are used, whether writing is performed on all the drives in real time or just on a single one, and how the information is synchronized between the hard 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 suggest that the error tolerance and the performance between the different RAID types can differ.

RAID in Semi-dedicated Hosting

The RAID type that we use for the cloud web hosting platform where your semi-dedicated hosting account shall be created is known as RAID-Z. What is different about it is that at least 1 of the disks is employed as a parity drive. Simply put, whenever any data is cloned on this specific drive, one more bit is added to it and in the event that a faulty disk is replaced, the data which will be cloned on it is a combination of the data on the remaining hard disks in the RAID and that on the parity one. This is done to make sure that the info is intact. During this process, your websites will be up and running normally since RAID-Z enables an entire drive to fail without causing any service disruptions and it simply works by using one of the remaining ones as the main production drive. Using RAID-Z together with the ZFS file system which uses checksums to warrant that no data can get silently corrupted on our servers, you won't ever have to worry about the integrity of your files.

RAID in VPS

If you employ one of our virtual private server solutions, any content that you upload will be stored on SSD drives which function in RAID. At least a single drive is intended for parity so as to guarantee the integrity of the information. In simple terms, this is a special drive where information is copied with one bit added to it. In case a disk from the RAID stops functioning, your websites will continue working and when a new disk replaces the defective one, the bits of the information that will be duplicated on it are calculated using the healthy and the parity drives. By doing this, any potential for corrupting data during the process is averted. We also employ standard hard disk drives which operate in RAID for storing backup copies, so in case you include this service to your VPS plan, your content will be saved on multiple drives and you will never need to worry about its integrity even in the event of multiple drive failures.