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 use many hard drives as one single logical unit. In other words, all drives are used as one and the info on all of them is identical. This type of a configuration has 2 major advantages over using a single drive to save data - the first one is redundancy, so if one drive doesn't work, the data will be accessed from the others, and the second is improved performance because the input/output, or reading/writing operations will be spread among different drives. There're different RAID types in accordance with the number of drives are employed, if reading and writing are both performed from all the 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, etcetera. Depending on the exact setup, the fault tolerance and the performance vary.

RAID in Shared Hosting

The SSD drives that our cutting-edge cloud web hosting platform employs for storage function in RAID-Z. This kind of RAID is designed 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 kept on the other drives is duplicated with an extra bit added to it. In case one of the disks stops working, your Internet sites will continue working from the other ones and as soon as we replace the problematic one, the info that will be copied on it will be recovered from what is stored on the other drives as well as the data from the parity disk. This is done so as to be able to recalculate the elements of each and every file correctly and to authenticate the integrity of the info copied on the new drive. This is one more level of security for the information you upload to your shared hosting account together with the ZFS file system which analyzes a unique digital fingerprint for each file on all the disk drives in real time.

RAID in Semi-dedicated Hosting

The RAID type which we use for the cloud Internet hosting platform where your semi-dedicated hosting account shall be created is known as RAID-Z. What is different about it is that at least 1 of the disks is employed as a parity drive. In simple terms, whenever any data is duplicated on this special hard drive, one more bit is included to it and in case a problematic disk is changed, the info that will be cloned on it is a mix of the data on the remaining disk drives in the RAID and that on the parity one. It's done this way to guarantee that the information is intact. During this process, your Internet sites will be up and running normally since RAID-Z makes it possible for a whole drive to fail without any service interruptions and it simply uses one of the remaining ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to guarantee that no data shall get silently corrupted on our servers, you will never have to worry about the integrity of your files.

RAID in VPS Hosting

The physical servers where we generate virtual private server employ extremely fast SSD drives which will boost the speed of your Internet sites considerably. The hard disks function in RAID to guarantee that you won't lose any information due to a power loss or a hardware failure. The production servers use a variety of drives where the information is saved and one disk is used for parity i.e. one bit is added to all the information copied on it, that makes it easier to recover the site content without any loss in case a main drive stops working. If you use our backup service, the info will be stored on a separate machine which uses standard hard-disk drives and though there's no parity one in this case, they are also in a RAID to make sure that we will have a backup of your site content at all times. With this configuration your info will always be safe since it will be available on multiple disk drives.