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 several hard drives as a single logical unit. Put simply, all the drives are used as one and the data on all of them is the same. This type of a configuration has two key advantages over using just a single drive to keep data - the first one is redundancy, so in the event that one drive stops working, the data will be accessible from the others, and the second is improved performance because the input/output, or reading/writing operations will be spread among a number of drives. There're different RAID types depending on the number of drives are employed, if reading and writing are both performed from all drives concurrently, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. Determined by the particular setup, the error tolerance and the performance may differ.

RAID in Shared Hosting

The SSD drives which our cutting-edge cloud hosting platform employs for storage function in RAID-Z. This type of RAID is created to work with the ZFS file system that runs on the platform and it uses the so-called parity disk - a specific drive where info kept on the other drives is cloned with an additional bit added to it. In the event that one of the disks fails, your websites will continue working from the other ones and as soon as we replace the faulty one, the data which will be cloned on it will be recovered from what is stored on the rest of the drives as well as the data from the parity disk. This is performed so as to be able to recalculate the elements of every single file properly and to verify the integrity of the information cloned on the new drive. This is an additional level of security for the info that you upload to your shared hosting account along with the ZFS file system that analyzes a special digital fingerprint for each file on all the drives in real time.

RAID in Semi-dedicated Servers

In case you host your websites within a semi-dedicated server account from our company, all the content which you upload will be stored on SSD drives which operate in RAID-Z. With this kind of RAID, at least 1 of the drives is employed for parity - when data is synchronized between the drives, an extra bit is added to it on the parity one. The idea behind this is to guarantee the integrity of the information which is cloned to a new drive if one of the hard drives in the RAID fails because the site content being copied on the brand new disk is recalculated from the info on the standard hard drives and on the parity one. An additional advantage of RAID-Z is that even in case a hard drive fails, the system can switch to another one immediately without service disruptions of any type. RAID-Z adds an additional level of security for the content you upload on our cloud hosting platform in addition to the ZFS file system which uses unique checksums so as to verify the integrity of each file.

RAID in VPS Servers

The SSD drives that we use on the physical machines where we set up VPS servers function in RAID to ensure that any content which you upload will be available and intact all the time. At least 1 drive is employed for parity - one bit of data is added to any data copied on it. In the event that a main drive stops working, it is changed and the data which will be duplicated on it is calculated between the remaining drives and the parity one. This is done to make sure that the needed information is copied and that not a single file is corrupted as the new drive will be used in the RAID afterwards. Also, we use hard drives functioning in RAID on the backup servers, so if you add this upgrade to your VPS package, you will use an even more reliable web hosting service since your content will be available on multiple drives regardless of any type of unforeseen hardware failure.