RAID, or Redundant Array of Independent Disks, is a technology of saving data on multiple hard disk drives which operate together as one single logical unit. The drives could be physical or logical i.e. in the latter case one single drive is divided into independent ones using virtualization software. In any case, exactly the same information is stored on all of the drives and the key benefit of using such a setup is that if a drive breaks down, the data will remain available on the remaining ones. Using a RAID also improves the overall performance because the input and output operations will be spread among a couple of drives. There are several kinds of RAID depending on how many hard disks are used, whether writing is performed on all drives in real time or just on one, and how the data is synced between the drives - whether it is recorded in blocks on one drive after another or all of it is mirrored from one on the others. These factors suggest that the fault tolerance and the performance between the different RAID types may vary.
RAID in Shared Web Hosting
Our cutting-edge cloud web hosting platform where all shared web hosting accounts are made employs quick SSD drives rather than the standard HDDs, and they operate in RAID-Z. With this setup, several hard drives work together and at least one is a dedicated parity disk. Put simply, when data is written on the rest of the drives, it is cloned on the parity one adding an extra bit. This is carried out for redundancy as even in case some drive fails or falls out of the RAID for whatever reason, the info 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 will be no service disorders. This is an additional level of protection for your data in addition to the top-notch ZFS file system that uses checksums to guarantee that all data on our servers is intact and is not silently corrupted.
RAID in Semi-dedicated Servers
The RAID type which we use for the cloud hosting platform where your semi-dedicated server account will be created is called RAID-Z. What is different about it is that at least one of the disks is used as a parity drive. Simply put, whenever any data is cloned on this specific drive, one more bit is included to it and if a defective disk is changed, the info which will be duplicated on it is a combination of the data on the other drives in the RAID and that on the parity one. We do this to ensure that your information is intact. Throughout this process, your websites will be up and running normally as RAID-Z enables a whole drive to fail without service disturbances and it simply uses one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system which uses checksums to guarantee that no data can get silently corrupted on our servers, you won't have to worry about the integrity of your files.
RAID in VPS Servers
The physical servers where we create VPS server work with high-speed SSD drives which will boost the speed of your sites significantly. The disk drives function in RAID to ensure that you will not lose any data due to a power loss or a hardware breakdown. The production servers work with many different drives where the information is stored and one disk is used for parity i.e. one bit is added to all the data copied on it, that makes it easier to recover the content without any loss in case a main drive fails. If you choose our backup service, the info will be kept on a separate machine that uses standard hard-disk drives and despite the fact that there isn't a parity one in this case, they are also in a RAID to guarantee that we will have a backup of your site content all of the time. With this configuration your info will always be safe since it will be available on several drives.