Redundant Array of Independent Disks, or RAID, is a way of keeping content on a number of hard drives concurrently. A RAID could be software or hardware depending on the HDDs that are used - physical or logical ones, but what’s common between them is the fact that they all function as one single unit where data is stored. The main advantage of employing a RAID is redundancy since the data on all drives shall be exactly the same at all times, so even in case some drive fails for whatever reason, the information will still be available on the other drives. The general performance will also improve because the reading and writing processes could be split between a number of drives, so a single one will not be overloaded. There are different types of RAIDs where the capabilities and fault tolerance may vary according to the particular setup - whether data is written on all the drives real-time or it is written on one drive and after that mirrored on another, what amount of drives are used for the RAID, and many others.

RAID in Web Hosting

The SSD drives which our cutting-edge cloud hosting platform uses for storage work in RAID-Z. This sort of RAID is developed to work with the ZFS file system that runs on the platform and it takes advantage of the so-called parity disk - a specific drive where info kept on the other drives is cloned with an additional bit added to it. If one of the disks stops working, your Internet sites will continue working from the other ones and once we replace the problematic one, the info that will be cloned on it will be recovered from what is stored on the rest of the drives together with the information from the parity disk. This is done so as to be able to recalculate the bits of every single file properly and to authenticate the integrity of the data duplicated on the new drive. This is one more level of security for the content you upload to your web hosting account along with the ZFS file system which analyzes a special digital fingerprint for every single file on all disk drives in real time.

RAID in Semi-dedicated Servers

The information uploaded to any semi-dedicated server account is kept on SSD drives which function in RAID-Z. One of the drives in such a configuration is used for parity - any time data is cloned on it, an additional bit is added. If a disk happens to be defective, it will be taken out of the RAID without interrupting the operation of the sites as the data will load from the rest of the drives, and when a brand new drive is included, the info that will be duplicated on it will be a blend between the data on the parity disk and data stored on the other hard disks in the RAID. That is done in order to ensure that the info that is being copied is accurate, so once the new drive is rebuilt, it can be incorporated into the RAID as a production one. This is one more warranty for the integrity of your data since the ZFS file system that runs on our cloud hosting platform analyzes a unique checksum of all of the copies of the files on the various drives to avoid any probability of silent data corruption.

RAID in VPS Servers

The physical servers where we generate VPS server use fast SSD drives which will boost the speed of your Internet sites substantially. The disk drives work in RAID to make sure that you will not lose any data because of a power loss or a hardware failure. The production servers work with a variety of 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, which makes it much easier to recover the content without any loss in case a main drive breaks down. If you choose our backup service, the data will be saved on an individual machine which uses standard hard-disk drives and although there's no parity one in this case, they are also in a RAID to ensure that we will have a backup of your content at all times. With this configuration your data will always be safe because it will be available on multiple disk drives.