RAID, or Redundant Array of Independent Disks, is a technology for storing data on a number hard drives that operate together as one single logical unit. The drives could be physical or logical i.e. in the second case one drive is divided into different ones using virtualization software. Either way, identical data is kept on all drives and the basic benefit of employing this type of a setup is that in the event that a drive fails, the data will remain available on the remaining ones. Employing a RAID also enhances the overall performance because the input and output operations will be spread among a number of drives. There are several types of RAID dependant upon how many hard drives are used, whether writing is done on all drives in real time or just on one, and how the info is synchronized between the hard drives - whether it is written in blocks on one drive after another or all of it is mirrored from one on the others. These factors show that the error tolerance and the performance between the different RAID types may vary.
RAID in Shared Web Hosting
The advanced cloud web hosting platform where all shared web hosting accounts are made uses quick SSD drives instead of the standard HDDs, and they operate in RAID-Z. With this setup, numerous hard drives work together and at least one of them is a dedicated parity disk. Put simply, when data is written on the rest of the drives, it is duplicated 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 some reason, the data can be rebuilt and verified thanks to the parity disk and the data saved on the other ones, which means that not a thing will be lost and there will be no service disturbances. This is one more level of security for your info along with the advanced ZFS file system which uses checksums to guarantee that all the data on our servers is undamaged and is not silently corrupted.
RAID in Semi-dedicated Servers
The RAID type which we use for the cloud Internet hosting platform where your semi-dedicated server account will be created is called RAID-Z. What's different about it is that at least 1 of the disks is used as a parity drive. Put simply, whenever any kind of data is cloned on this specific disk drive, one more bit is added to it and in the event that a malfunctioning disk is changed, the information which will be copied on it is a combination of the data on the remaining hard drives in the RAID and that on the parity one. This is done to guarantee that your info is intact. During this process, your sites will be working normally since RAID-Z enables an entire drive to fail without service interruptions 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 ensure that no data shall get silently corrupted on our servers, you'll never need to worry about the integrity of your files.
RAID in VPS Servers
The physical servers where we generate VPS server work with extremely fast SSD drives which will boost the speed of your Internet sites considerably. The hard drives operate in RAID to guarantee that you won't lose any data because of a power loss or a hardware failure. The production servers use multiple drives where the info is saved and one disk is used for parity i.e. one bit is added to all the info copied on it, which makes it easier to restore the content without any loss in the event a main drive breaks down. If you pick our backup service, your data will be kept on an independent machine which uses standard hard-disk drives and although there's no parity one in this case, they are also in a RAID to make sure that we will have a backup of your site content at all times. With this particular setup your data will always be safe as it will be available on many disk drives.