RAID, which is an acronym of Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that enables a system to use multiple hard drives as a single logical unit. Put simply, all the drives are used as one and the information on all of them is identical. This type of a configuration has 2 key advantages over using a single drive to store data - the first one is redundancy, so if one drive breaks down, the data will be accessible from the others, and the second is improved performance as the input/output, or reading/writing operations will be distributed among multiple drives. There're different RAID types depending on how many drives are employed, if reading and writing are both executed from all drives concurrently, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. Determined by the particular setup, the fault tolerance and the performance could differ.
RAID in Shared Website Hosting
Our cutting-edge cloud hosting platform where all shared website hosting accounts are made employs fast SSD drives instead of the classic HDDs, and they work in RAID-Z. With this setup, a number of hard disks work together and at least one is a dedicated parity disk. Put simply, when data is written on the rest of the drives, it's duplicated on the parity one adding an extra bit. This is done for redundancy as even if some drive fails or falls out of the RAID for whatever reason, the data can be rebuilt and verified using the parity disk and the data stored on the other ones, which means that not a thing will be lost and there won't be any service disorders. This is another level of security for your info together with the top-notch 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 Hosting
If you host your sites in a semi-dedicated hosting account from our firm, all the content that you upload will be stored on SSD drives that work in RAID-Z. With this type of RAID, at least one of the drives is employed for parity - when data is synced between the hard drives, an extra bit is added to it on the parity one. The reasoning behind this is to guarantee the integrity of the data which is copied to a new drive if one of the hard drives in the RAID stops working since the website content being copied on the brand new disk is recalculated from the info on the standard hard drives and on the parity one. Another advantage of RAID-Z is that even in the event that a drive stops functioning, the system can switch to a different one quickly without service disturbances of any type. RAID-Z adds an extra level of security for the content which you upload on our cloud hosting platform together with the ZFS file system which uses unique checksums in order to authenticate the integrity of each and every file.
RAID in VPS Hosting
The physical servers where we generate virtual private server work with quick SSD drives which will boost the speed of your Internet sites noticeably. The hard disks operate in RAID to ensure that you won't lose any info due to a power loss or a hardware failure. The production servers employ multiple drives where the information is kept and one disk is used for parity i.e. one bit is added to all of the information copied on it, that makes it much easier to recover the site content without any loss in case a main drive breaks down. If you use our backup service, the data will be stored on an independent machine which uses standard hard-disk drives and though 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 content all of the time. With this type of configuration your data will always be safe as it will be available on many drives.