Redundant Array of Independent Disks, or RAID, is a method of saving content on several hard drives concurrently. A RAID might be software or hardware based on the hard drives that are used - physical or logical ones, yet what’s common between them is that they all perform as one single unit where your information is saved. The key advantage of employing a RAID is redundancy as the data on all the drives will be exactly the same all of the time, so even if some drive fails for whatever reason, the data will still be available on the rest of the drives. The general performance is also enhanced as the reading and writing processes can be split between various drives, so a single one can't be overloaded. There're different kinds of RAIDs where the capabilities and fault tolerance could differ based on the exact setup - whether info is written on all drives in real time or it's written on one drive and then mirrored on another, what amount of drives are used for the RAID, etcetera.

RAID in Cloud Website Hosting

Our advanced cloud web hosting platform where all cloud website hosting accounts are generated employs super fast SSD drives as an alternative to the classic HDDs, and they work in RAID-Z. With this setup, numerous hard disks operate together and at least one of them is a dedicated parity disk. Put simply, when data is written on the rest of the drives, it's copied 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 some reason, the information can be rebuilt and verified thanks to the parity disk and the data recorded on the other ones, therefore practically nothing will be lost and there will not be any service interruptions. This is another level of security for your info in addition to the revolutionary ZFS file system which uses checksums to ensure that all data on our servers is undamaged and is not silently corrupted.

RAID in Semi-dedicated Servers

The RAID type that we employ for the cloud web hosting platform where your semi-dedicated server account shall be created is known as RAID-Z. What is different about it is that at least one of the disks is employed as a parity drive. In simple terms, whenever any data is copied on this special drive, one more bit is added to it and if a malfunctioning disk is replaced, the information which will be copied on it is a mix of the data on the other hard disks in the RAID and that on the parity one. This is done to ensure that the information is intact. During this process, your websites will be up and running normally since RAID-Z allows for an entire drive to fail without service interruptions and it simply uses one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to warrant that no data can get silently corrupted on our servers, you won't ever have to worry about the integrity of your files.

RAID in VPS Servers

The SSD drives that we use on the machines where we create VPS servers function in RAID to ensure that any content you upload will be available and intact all of the time. At least 1 drive is used for parity - one bit of information is added to any data cloned on it. In case a main drive stops working, it is replaced and the info which will be cloned on it is calculated between the other drives and the parity one. It's done this way to ensure that the required data is copied and that not a single file is corrupted because the new drive will be incorporated into the RAID afterwards. In addition, we use hard disk drives functioning in RAID on the backup servers, so in the event that you add this upgrade to your VPS plan, you shall use an even more reliable hosting service as your content will be available on multiple drives irrespective of any type of sudden hardware failure.