Redundant Array of Independent Disks, or RAID, is a way of keeping content on a number of hard disk drives simultaneously. A RAID might be software or hardware depending on the hard drives which are used - physical or logical ones, yet what is common between them is that they all perform as one single unit where data is stored. The main advantage of using a RAID is redundancy since the information on all of the drives is exactly the same all of the time, so even if some drive fails for whatever reason, the info will still be available on the other drives. The overall performance will also improve since the reading and writing processes could be split between various drives, so a single one won't be overloaded. There are different kinds of RAIDs where the efficiency and fault tolerance can vary based on the particular setup - whether information is written on all the drives in real time or it is written on one drive and afterwards mirrored on another, the number of drives are used for the RAID, etcetera.

RAID in Website Hosting

The NVMe drives which our cutting-edge cloud Internet hosting platform uses for storage operate in RAID-Z. This kind of RAID is designed to work with the ZFS file system that runs on the platform and it employs the so-called parity disk - a specific drive where data stored on the other drives is duplicated with an extra bit added to it. If one of the disks stops working, your Internet sites will continue working from the other ones and after we replace the problematic one, the data which will be copied on it will be rebuilt from what is stored on the other drives along with the info from the parity disk. This is performed in order to be able to recalculate the elements of each and every file correctly and to authenticate the integrity of the info duplicated on the new drive. This is one more level of security for the information that you upload to your website hosting account together with the ZFS file system that compares a special digital fingerprint for each and every file on all of the disk drives in real time.

RAID in Semi-dedicated Servers

The RAID type which we employ for the cloud Internet hosting platform where your semi-dedicated server account will be created is called RAID-Z. What is different about it is that at least 1 of the disks is employed as a parity drive. In simple terms, whenever any data is cloned on this particular disk drive, one more bit is included to it and in the event that a faulty disk is replaced, the data that will be cloned on it is a mix of the data on the remaining disk drives in the RAID and that on the parity one. It's done this way to ensure that the information is intact. During this process, your websites will be up and running normally because RAID-Z makes it possible for an entire drive to fail without service disruptions and it simply works by using one of the other ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to warrant that no data can get silently corrupted on our servers, you will not have to worry about the integrity of your files.

RAID in VPS Servers

The NVMe drives which we use on the physical machines where we create VPS servers work in RAID to ensure that any content that you upload will be available and intact all the time. At least one drive is used for parity - one bit of information is added to any data copied on it. If a main drive breaks down, it is changed and the data that will be cloned on it is calculated between the other drives and the parity one. It's done this way to make sure that the needed data is copied and that not a single file is corrupted since the new drive will be used in the RAID afterwards. In addition, we use hard disks working in RAID on the backup servers, so in the event that you add this upgrade to your VPS package, you will use an even more reliable web hosting service because your content will be available on multiple drives irrespective of any type of unexpected hardware malfunction.