Redundant Array of Independent Disks, or RAID, is a method of storing content on a number of hard drives at the same time. A RAID can be software or hardware depending on the HDDs which are used - physical or logical ones, but what’s common between them is the fact that they all operate as one single unit where info is kept. The biggest advantage of employing a RAID is redundancy as the information on all the drives will be exactly the same all of the time, so even in the event that one of the drives fails for whatever reason, the information will still be available on the rest of the 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 performance and fault tolerance could differ based on the exact setup - whether data is written on all the drives real-time or it is written on a single drive and after that mirrored on another, what amount of drives are used for the RAID, and many others.

RAID in Shared Hosting

Our cutting-edge cloud hosting platform where all shared hosting accounts are created uses quick SSD drives as opposed to the standard HDDs, and they work in RAID-Z. With this setup, numerous hard drives function together and at least one is a dedicated parity disk. In simple terms, when data is written on the remaining drives, it's duplicated 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 data can be rebuilt and verified using the parity disk and the data stored on the other ones, which means that not a single thing will be lost and there won't be any service interruptions. This is an additional level of security for your information together with the state-of-the-art ZFS file system which uses checksums to make sure that all the data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Hosting

The SSD drives which are used for saving any site content uploaded to the semi-dedicated hosting accounts that we offer function in RAID-Z. This is a special configuration where one or more disk drives are employed for parity i.e. the system will include an extra bit to any data duplicated on this kind of a disk drive. If a disk fails and is substituted with another one, what information will be copied on the latter shall be a mix calculated between the data on the remaining disks and that on the parity one. This is done to guarantee that the data on the new drive shall be accurate. Throughout the process, the RAID will continue operating adequately and the faulty drive will not affect the adequate operation of your sites in any way. Using SSDs in RAID-Z is an amazing addition to the ZFS file system that runs on our cutting-edge cloud platform in terms of preserving the integrity of your files since ZFS uses special digital identifiers referred to as checksums to prevent silent data corruption.

RAID in VPS

The SSD drives that we use on the physical machines where we generate virtual private servers work in RAID to make sure that any content which you upload will be available and intact at all times. At least 1 drive is used for parity - one bit of info is added to any data copied on it. If a main drive breaks down, it is changed and the information which will be copied on it is calculated between the other drives and the parity one. This is done to ensure that the needed data is copied and that not a single file is corrupted as the new drive will be included in the RAID afterwards. Also, we use hard disks functioning in RAID on the backup servers, so if you add this upgrade to your VPS plan, you'll use an even more reliable web hosting service because your content will be available on multiple drives irrespective of any sort of unexpected hardware malfunction.