RAID, or Redundant Array of Independent Disks, is a technology of keeping data on a number hard drives which function together as one logical unit. The drives can be physical or logical i.e. in the second case a single drive is divided into independent ones via virtualization software. In either case, exactly the same info is stored on all the drives and the key advantage of using this type of a setup is that if a drive breaks down, the data will still be available on the other ones. Having a RAID also enhances the performance as the input and output operations will be spread among a number of drives. There are several kinds of RAID depending on how many hard disks are used, whether writing is carried out on all of the drives in real time or just on a single one, and how the info is synchronized between the drives - whether it is recorded in blocks on one drive after another or it is mirrored from one on the others. All of these factors mean that the fault tolerance as well as the performance between the different RAID types could differ.

RAID in Shared Hosting

Our advanced cloud web hosting platform where all shared hosting accounts are generated uses fast SSD drives instead of the traditional HDDs, and they operate in RAID-Z. With this setup, a number of hard disk drives work together and at least 1 is a dedicated parity disk. In simple terms, when data is written on the remaining 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 information can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, which means that absolutely nothing will be lost and there will be no service disorders. This is one more level of security for your info in addition to the revolutionary ZFS file system which uses checksums to make sure that all of the data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Servers

The SSD drives which are used for storing any site content uploaded to the semi-dedicated server accounts which we offer operate in RAID-Z. This is a special setup where one or more disk drives are employed for parity i.e. the system will include an additional bit to any data cloned on this kind of a hard drive. If a disk fails and is substituted with a new one, what data will be cloned on the latter will be a mix calculated between the data on the remaining hard disks and that on the parity one. This is done to make sure that the data on the new drive will be correct. Throughout the procedure, the RAID will continue functioning adequately and the malfunctioning drive will not have an impact on the adequate operation of your Internet sites in any respect. Working with SSDs in RAID-Z is a great addition to the ZFS file system which runs on our revolutionary cloud platform with regards to preserving the integrity of your files as ZFS uses unique digital identifiers known as checksums so as to prevent silent data corruption.

RAID in VPS Servers

The physical servers where we generate VPS server employ extremely fast SSD drives that will boost the speed of your websites significantly. The drives operate in RAID to ensure that you will not lose any data due to a power loss or a hardware breakdown. The production servers take advantage of many different drives where the info is stored and one disk is used for parity i.e. one bit is added to all the information copied on it, that makes it easier to restore the site content without any loss in the event a main drive breaks down. In case you use our backup service, the information will be stored on an independent machine which 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 the time. With this particular configuration your data will always be safe as it will be available on multiple disk drives.