RAID, or Redundant Array of Independent Disks, is a technology for storing data on multiple hard drives that work together as one single logical unit. The drives could be physical or logical i.e. in the aforementioned case a single drive is split into independent ones via virtualization software. In any case, the very same data is kept on all the drives and the main benefit of employing this kind of a setup is that in the event that a drive breaks down, the data will remain available on the remaining ones. Using a RAID also enhances the overall performance since the input and output operations will be spread among a couple of drives. There are several types of RAID based on how many hard drives are used, whether writing is carried out on all drives in real time or just on a single one, and how the data is synchronized between the drives - whether it's written in blocks on one drive after another or all of 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 Website Hosting

Our advanced cloud Internet hosting platform where all shared website hosting accounts are generated employs quick SSD drives instead of the standard HDDs, and they function in RAID-Z. With this setup, a number of hard disk drives work together and at least one of them is a dedicated parity disk. Simply put, when data is written on the remaining drives, it's cloned on the parity one adding an extra bit. This is carried out for redundancy as even if some drive fails or falls out of the RAID for whatever reason, the info can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, therefore not a thing will be lost and there will not be any service interruptions. This is one more level of security for your information in addition to 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

In case you host your sites within a semi-dedicated hosting account from our firm, all the content that you upload will be stored on SSD drives which work in RAID-Z. With this type of RAID, at least one of the disks is used for parity - when data is synced between the hard drives, an extra bit is included in it on the parity one. The purpose behind this is to ensure the integrity of the information which is duplicated to a new drive in case one of the hard drives in the RAID fails as the website content being copied on the brand new disk is recalculated from the info on the standard drives and on the parity one. Another advantage of RAID-Z is the fact that even in case a drive stops working, the system could switch to another one instantly without service disturbances of any type. RAID-Z adds one more level of safety for the content you upload on our cloud hosting platform along with the ZFS file system that uses unique checksums as a way to authenticate the integrity of each file.

RAID in VPS

The SSD drives which we use on the machines where we generate virtual private servers function in RAID to ensure that any content which you upload will be available and intact all the time. At least 1 drive is used for parity - one bit of information is added to any data copied on it. If a main drive fails, it is changed and the data that will be duplicated on it is calculated between the other drives and the parity one. It's done this way to ensure that the correct data is copied and that no file is corrupted because the new drive will be used in the RAID afterwards. Also, we use hard disk drives operating in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you'll use an even more reliable hosting service as your content will be available on multiple drives regardless of any type of unforeseen hardware malfunction.