RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which makes it possible for a system to employ multiple hard drives as one single logical unit. Simply put, all the drives are used as one and the info on all of them is the same. This kind of a setup has 2 huge advantages over using just a single drive to save data - the first is redundancy, so if one drive stops working, the data will be accessible through the remaining ones, and the second one is improved performance as the input/output, or reading/writing operations will be distributed among multiple drives. You can find different RAID types in accordance with the number of drives are used, if reading and writing are both executed from all drives at the same time, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and many others. Determined by the exact setup, the error tolerance and the performance may differ.

RAID in Shared Hosting

The state-of-the-art cloud web hosting platform where all shared hosting accounts are generated employs quick SSD drives as opposed to the standard HDDs, and they work in RAID-Z. With this configuration, multiple hard drives work together and at least one of them is a dedicated parity disk. In simple terms, when data is written on the remaining drives, it's duplicated on the parity one adding an extra bit. This is done for redundancy as even in case some drive fails or falls out of the RAID for some reason, the info can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, which means that nothing will be lost and there will be no service disorders. This is an additional level of protection for your data together with the state-of-the-art ZFS file system which uses checksums to ensure that all of the data on our servers is undamaged and is not silently corrupted.

RAID in Semi-dedicated Hosting

The RAID type that we use for the cloud web hosting platform where your semi-dedicated hosting account will be created is named RAID-Z. What's different about it is that at least one of the disks is employed as a parity drive. Put simply, whenever any kind of data is copied on this particular disk drive, one more bit is included to it and if a problematic disk is replaced, the info that will be cloned on it is a combination of the data on the other hard disks in the RAID and that on the parity one. We do this to ensure that the info is intact. During this process, your websites will be functioning normally as RAID-Z allows for a whole drive to fail without any service disruptions and it simply works by using one of the remaining 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 need to worry about the integrity of your files.

RAID in VPS Hosting

The SSD drives which we use on the machines where we generate virtual private servers work in RAID to make sure that any content that you upload will be available and intact all the time. At least 1 drive is employed for parity - one bit of information is added to any data cloned on it. In the event that a main drive stops working, it is replaced and the information that will be duplicated on it is calculated between the remaining drives and the parity one. This is done to ensure that the correct data is copied and that no file is corrupted because the new drive will be used in 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 will use an even more reliable hosting service because your content will be available on multiple drives regardless of any kind of unforeseen hardware failure.