RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which permits a system to take advantage of many hard drives as a single logical unit. In other words, all drives are used as one and the info on all of them is identical. This kind of a setup has two major advantages over using just a single drive to store data - the first is redundancy, so in case one drive breaks down, the info will be accessible through the remaining ones, and the second is improved performance since the input/output, or reading/writing operations will be spread among a number of drives. There are different RAID types based on what number of drives are employed, if reading and writing are both handled from all drives at the same time, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. According to the exact setup, the fault tolerance and the performance vary.

RAID in Shared Hosting

Our state-of-the-art cloud web hosting platform where all shared hosting accounts are created uses fast SSD drives rather than the classic HDDs, and they work in RAID-Z. With this setup, a number of hard disks operate together and at least 1 is a dedicated parity disk. In simple terms, when data is written on the rest of the drives, it is cloned 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 recorded on the other ones, which means that absolutely nothing will be lost and there will be no service disorders. This is another level of protection for your data together with the advanced ZFS file system which uses checksums to make sure that all data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Hosting

If you host your websites inside a semi-dedicated hosting account from our firm, all the content which you upload will be stored on SSD drives which operate in RAID-Z. With this kind of RAID, at least one of the hard disks is employed for parity - when data is synchronized between the disks, an additional bit is added to it on the parity one. The purpose behind this is to guarantee the integrity of the data which is duplicated to a brand new drive in case one of the disks in the RAID fails as the site content being copied on the brand new disk is recalculated from the information on the standard hard drives and on the parity one. Another advantage of RAID-Z is that even if a hard drive stops working, the system could switch to a different one quickly without service disturbances of any sort. RAID-Z adds one more level of security for the content that you upload on our cloud hosting platform along with the ZFS file system which uses unique checksums so as to authenticate the integrity of each file.

RAID in VPS Web Hosting

The SSD drives which we use on the machines where we create virtual private servers work in RAID to make sure that any content that you upload will be available and intact at all times. At least 1 drive is used for parity - one bit of information is added to any data copied on it. In the event that a main drive fails, it is replaced and the info which will be cloned on it is calculated between the rest of the drives and the parity one. It's done this way to ensure that the required data is copied and that no file is corrupted since the new drive will be a part of the RAID afterwards. Also, we use hard drives working in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you will use an even more reliable hosting service since your content will be available on multiple drives irrespective of any type of sudden hardware malfunction.