Redundant Array of Independent Disks, or RAID, is a way of keeping content on a number of hard disk drives at the same time. A RAID might be software or hardware depending on the drives that are used - physical or logical ones, however what is common between them is that they all function as just one single unit where info is saved. The biggest advantage of employing a RAID is redundancy since the information on all the drives is identical all of the time, so even if one of the drives fails for some reason, the data will still be available on the rest of the drives. The general performance is also better since the reading and writing processes can be split between different drives, so a single one will never be overloaded. There are different sorts of RAIDs where the efficiency and fault tolerance may vary based on the specific setup - whether your data is written on all of the drives real-time or it is written on a single drive and afterwards mirrored on another, what amount of drives are used for the RAID, etcetera.

RAID in Semi-dedicated Servers

The info uploaded to any semi-dedicated server account is stored on SSD drives which work in RAID-Z. One of the drives in such a setup is used for parity - every time data is cloned on it, an extra bit is added. If a disk turns out to be problematic, it will be removed from the RAID without disturbing the functioning of the websites as the data will load from the remaining drives, and when a new drive is added, the data that will be cloned on it will be a combination between the information on the parity disk and data kept on the other hard drives in the RAID. This is done in order to ensure that the info that is being cloned is correct, so once the new drive is rebuilt, it could be incorporated into the RAID as a production one. This is an extra warranty for the integrity of your info as the ZFS file system that runs on our cloud web hosting platform analyzes a unique checksum of all of the copies of the files on the separate drives to avoid any probability of silent data corruption.

RAID in VPS Servers

If you use one of our VPS server plans, any content which you upload will be saved on SSD drives that function in RAID. At least 1 drive is used for parity to guarantee the integrity of the data. In simple terms, this is a special drive where information is copied with one bit added to it. In the event that a disk within the RAID stops functioning, your Internet sites will continue working and when a new disk takes the place of the defective one, the bits of the information that will be duplicated on it are calculated using the healthy and the parity drives. This way, any probability of corrupting data during the process is prevented. We also use regular hard drives which operate in RAID for storing backup copies, so should you add this service to your VPS plan, your website content will be stored on multiple drives and you will never have to worry about its integrity even in the event of multiple drive breakdowns.