RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that makes it possible for a system to employ multiple hard drives as a single logical unit. Simply put, all of the drives are used as one and the information on all of them is identical. This type of a configuration has 2 huge advantages over using a single drive to store data - the first one is redundancy, so if one drive fails, the information will be accessed through the remaining ones, and the second is improved performance since the input/output, or reading/writing operations will be distributed among several drives. You can find different RAID types based on the number of drives are employed, if reading and writing are both executed from all of the drives simultaneously, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, etcetera. Depending on the particular setup, the fault tolerance and the performance may vary.

RAID in Shared Website Hosting

The SSD drives that our cutting-edge cloud hosting platform employs for storage work in RAID-Z. This type of RAID is intended to work with the ZFS file system which runs on the platform and it works by using the so-called parity disk - a special drive where information located on the other drives is cloned with an additional bit added to it. In case one of the disks stops functioning, your sites will continue working from the other ones and once we replace the bad one, the info that will be cloned on it will be rebuilt from what is stored on the rest of the drives along with the information from the parity disk. This is performed in order to be able to recalculate the elements of every file adequately and to validate the integrity of the information cloned on the new drive. This is one more level of security for the information which you upload to your shared website hosting account together with the ZFS file system which analyzes a unique digital fingerprint for every single file on all of the disk drives in real time.

RAID in Semi-dedicated Servers

The RAID type that we use for the cloud Internet hosting platform where your semi-dedicated server account will be created is named RAID-Z. What's different about it is that at least 1 of the disks is used as a parity drive. Put simply, whenever any kind of data is duplicated on this specific drive, one more bit is included to it and in the event that a defective disk is changed, the data which will be duplicated on it is a combination of the data on the other hard drives in the RAID and that on the parity one. We do this to guarantee that the info is intact. Throughout this process, your Internet sites will be functioning normally because RAID-Z enables a whole drive to fail without service disruptions and it simply works by using one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to warrant that no data will get silently corrupted on our servers, you will never need to worry about the integrity of your files.