Redundant Array of Independent Disks, or RAID, is a way of keeping content on multiple hard disks concurrently. A RAID can be software or hardware based on the drives which are used - physical or logical ones, yet what’s common between them is that they all function as just one single unit where data is kept. The key advantage of using a RAID is redundancy as the info on all the drives is exactly the same all the time, so even if a drive fails for whatever reason, the data will still be available on the rest of the drives. The overall performance is also enhanced because the reading and writing processes could be split between multiple drives, so a single one won't be overloaded. There're different sorts of RAIDs where the performance and fault tolerance may vary depending on the exact setup - whether info is written on all drives real-time or it is written on a single drive and then mirrored on another, the number of drives are used for the RAID, etc.

RAID in Cloud Hosting

The advanced cloud web hosting platform where all cloud hosting accounts are created employs fast SSD drives rather than the traditional HDDs, and they operate in RAID-Z. With this setup, a number of hard drives operate together and at least 1 is a dedicated parity disk. Simply put, when data is written on the rest of the drives, it's copied on the parity one adding an extra bit. This is done for redundancy as even if some drive fails or falls out of the RAID for whatever reason, the data can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, which means that absolutely nothing will be lost and there will be no service disorders. This is another level of security for your info in addition to the revolutionary ZFS file system that uses checksums to guarantee that all of the data on our servers is undamaged and is not silently corrupted.

RAID in Semi-dedicated Servers

The RAID type which we employ for the cloud 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 1 of the disks is used as a parity drive. Simply put, whenever any data is duplicated on this special disk drive, one more bit is added to it and in the event that a malfunctioning disk is replaced, the info that will be cloned on it is a combination of the data on the remaining disk drives in the RAID and that on the parity one. This is done to guarantee that your information is intact. Throughout this process, your Internet sites will be functioning normally as RAID-Z enables a whole drive to fail without any service interruptions 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 that uses checksums to guarantee that no data will get silently corrupted on our servers, you will not need to worry about the integrity of your files.