Redundant Array of Independent Disks, or RAID, is a method of keeping content on several hard drives at the same time. A RAID might be software or hardware based on the hard drives which are used - physical or logical ones, yet what’s common between them is that they all perform as just a single unit where information is kept. The biggest advantage of employing a RAID is redundancy as the information on all drives shall be identical all the time, so even in case a drive fails for some reason, the data will still be present on the remaining drives. The general performance is enhanced as well since the reading and writing processes will be split between different drives, so a single one will never be overloaded. There are different sorts of RAIDs where the capabilities and fault tolerance could differ according to the particular setup - whether info is written on all the drives real-time or it's written on one drive and after that mirrored on another, what number of drives are used for the RAID, etc.
RAID in Cloud Hosting
Our advanced cloud Internet hosting platform where all cloud hosting accounts are generated employs quick SSD drives as opposed to the standard HDDs, and they work in RAID-Z. With this setup, multiple hard drives work together and at least 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 performed for redundancy as even in case some drive fails or falls out of the RAID for some reason, the data can be rebuilt and verified using the parity disk and the data stored on the other ones, thus not a single thing will be lost and there won't be any service disturbances. This is an additional level of protection for your data along with the top-notch ZFS file system that uses checksums to make sure that all data on our servers is undamaged and is not silently corrupted.
RAID in Semi-dedicated Servers
The SSD drives which are used for saving any website content uploaded to the semi-dedicated server accounts which we offer work in RAID-Z. This is a specific configuration where one or more disk drives are used for parity i.e. the system will include an extra bit to any data duplicated on this type of a drive. If a disk fails and is replaced with a new one, what data will be cloned on the latter shall be a combination calculated between the data on the remaining drives and that on the parity one. This is done to guarantee that the info on the new drive shall be accurate. Throughout the process, the RAID will continue operating adequately and the malfunctioning drive will not have an impact on the adequate operation of your websites at all. Using SSDs in RAID-Z is a superb addition to the ZFS file system which runs on our revolutionary cloud platform with respect to preserving the integrity of your files as ZFS uses specific digital identifiers named checksums in order to prevent silent data corruption.
RAID in VPS Servers
The physical servers where we make VPS server employ quick SSD drives that will raise the speed of your websites noticeably. The hard disks work in RAID to ensure that you won't lose any information as a result of a power loss or a hardware breakdown. The production servers work with multiple drives where the info 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 website content without any loss if a main drive breaks down. If you take advantage of our backup service, the data will be stored on an independent machine which uses standard hard-disk drives and though there's no parity one in this case, they are also in a RAID to make sure that we will have a backup copy of your site content all of the time. With this particular setup your info will always be safe as it will be available on several drives.