RAID, or Redundant Array of Independent Disks, is a technology of keeping data on several hard disks that function together as a single logical unit. The drives could be physical or logical i.e. in the second case a single drive is divided into different ones via virtualization software. In any case, exactly the same data is stored on all the drives and the main advantage of employing this type of a setup is that if a drive breaks down, the data will still be available on the other ones. Employing a RAID also boosts the performance as the input and output operations will be spread among several drives. There are several kinds of RAID dependant upon how many hard drives are used, whether writing is carried out on all the drives in real time or just on a single one, and how the information is synchronized between the hard drives - whether it's written in blocks on one drive after another or it is mirrored from one on the others. All of these factors imply that the error tolerance as well as the performance between the various RAID types may vary.

RAID in Cloud Web Hosting

The SSD drives that our cutting-edge cloud hosting platform uses for storage operate in RAID-Z. This sort of RAID is developed to work with the ZFS file system that runs on the platform and it uses the so-called parity disk - a specific drive where information stored on the other drives is duplicated with an extra bit added to it. In the event that one of the disks stops functioning, your sites shall continue working from the other ones and after we replace the faulty one, the data which will be cloned on it will be recovered from what is stored on the other drives as well as the info from the parity disk. This is performed so as to be able to recalculate the elements of each file correctly and to confirm the integrity of the info duplicated on the new drive. This is one more level of security for the info you upload to your cloud web hosting account in addition to the ZFS file system that analyzes a unique digital fingerprint for each and every file on all of the disk drives in real time.

RAID in Semi-dedicated Servers

The RAID type which we use for the cloud Internet hosting platform where your semi-dedicated server account shall be created is referred to as RAID-Z. What's different about it is that at least 1 of the disks is employed as a parity drive. Put simply, whenever any data is cloned on this specific hard drive, one more bit is added to it and in case a defective disk is changed, the data that will be duplicated on it is a combination of the data on the other disk drives in the RAID and that on the parity one. We do this to ensure that your information is intact. Throughout this process, your websites will be working normally since RAID-Z enables a whole drive to fail without service disturbances and it simply works by using one of the remaining ones as the main production drive. Employing RAID-Z together with the ZFS file system that uses checksums to warrant that no data shall get silently corrupted on our servers, you will never need to worry about the integrity of your files.

RAID in VPS Servers

The physical servers where we make VPS server use high-speed SSD drives that will increase the speed of your websites substantially. The hard drives operate in RAID to ensure that you won't lose any information as a result of a power loss or a hardware breakdown. The production servers work with multiple drives where the data is stored and one disk is used for parity i.e. one bit is added to all the info copied on it, that makes it much easier to recover the site content without any loss in case a main drive fails. If you pick our backup service, your data will be stored on a separate machine that uses standard hard-disk drives and despite the fact that there isn't a parity one in this case, they are also in a RAID to ensure 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 many disk drives.