RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which allows a system to employ many hard drives as one single logical unit. To put it differently, all drives are used as one and the info on all of them is identical. Such a setup has two huge advantages over using a single drive to save data - the first one is redundancy, so if one drive breaks down, the data will be accessed from the remaining ones, and the second one is improved performance as the input/output, or reading/writing operations will be distributed among a number of drives. There're different RAID types depending on what number of drives are used, if reading and writing are both done from all of 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. According to the particular setup, the error tolerance and the performance may vary.

RAID in Cloud Hosting

The SSD drives that our cutting-edge cloud web hosting platform employs for storage operate in RAID-Z. This sort 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 specific drive where information located on the other drives is cloned with an additional bit added to it. If one of the disks fails, your sites shall continue working from the other ones and as soon as we replace the bad one, the info which will be copied on it will be rebuilt from what is stored on the other drives as well as the data from the parity disk. This is done in order to be able to recalculate the bits of every single file properly and to validate the integrity of the data cloned on the new drive. This is one more level of security for the information which you upload to your cloud hosting account together with the ZFS file system which compares a unique digital fingerprint for each file on all the disk drives in real time.

RAID in Semi-dedicated Servers

The SSD drives that are used for saving any website content uploaded to the semi-dedicated server accounts that we offer work in RAID-Z. This is a specific configuration where one or more disk drives are used for parity i.e. the system will include an extra bit to any data duplicated on this kind of a disk drive. In case that a disk fails and is substituted with a new one, what data will be copied on the latter shall be a combination calculated between the data on the remaining disks and that on the parity one. This is done to guarantee that the information on the new drive shall be accurate. Throughout the process, the RAID will continue functioning normally and the faulty drive will not affect the proper operation of your Internet sites in any respect. Working with SSDs in RAID-Z is a great addition to the ZFS file system that runs on our cutting-edge cloud platform with regards to preserving the integrity of your files since ZFS uses unique digital identifiers called checksums to avoid silent data corruption.

RAID in VPS Servers

The physical servers where we generate VPS server employ super fast SSD drives that will increase the speed of your websites considerably. The hard disks work in RAID to ensure that you will not lose any info as a result of a power loss or a hardware failure. The production servers use many different drives where the information is saved and one disk is used for parity i.e. one bit is added to all data copied on it, which makes it much easier to recover the website content without any loss in the event a main drive breaks down. If you choose our backup service, the data will be saved on an individual machine that uses standard hard-disk drives and although there isn't a parity one in this case, they are also in a RAID to make sure that we will have a backup of your site content all the time. With this particular setup your info will always be safe since it will be available on multiple disk drives.