RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard disk drives that work together as one logical unit. The drives could be physical or logical i.e. in the latter case one single drive is divided into separate ones via virtualization software. In any case, the very same information is kept on all drives and the basic benefit of employing such a setup is that in case a drive breaks down, the data shall still be available on the other ones. Employing a RAID also enhances the overall performance since the input and output operations will be spread among a couple of drives. There are several kinds of RAID dependant upon how many drives are used, whether writing is carried out on all the drives in real time or just on a single one, and how the data is synced between the drives - whether it is recorded in blocks on one drive after another or it is mirrored from one on the others. All of these factors show that the fault tolerance and the performance between the various RAID types can differ.

RAID in Cloud Hosting

The SSD drives that our cutting-edge cloud hosting platform uses for storage function in RAID-Z. This type of RAID is designed to work with the ZFS file system that runs on the platform and it works by using the so-called parity disk - a special drive where info stored on the other drives is cloned with an additional bit added to it. In case one of the disks fails, your websites shall continue working from the other ones and once we replace the faulty one, the info that will be cloned on it will be rebuilt from what is stored on the rest of the drives together with the data from the parity disk. This is done so as to be able to recalculate the bits of each and every file adequately and to validate 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 hosting account together with the ZFS file system which analyzes a special 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 will be created is named RAID-Z. What's different about it is that at least one of the disks is employed as a parity drive. In simple terms, whenever any kind of data is copied on this particular disk drive, one more bit is included to it and in the event that a problematic disk is changed, the information that will be copied on it is a combination of the data on the remaining hard drives in the RAID and that on the parity one. This is done to make sure that your data is intact. During this process, your websites will be up and running normally as RAID-Z enables a whole drive to fail without any service disturbances and it simply works by using one of the other 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 won't have to worry about the integrity of your files.

RAID in VPS Servers

All VPS server accounts which our company offers are made on physical servers which take advantage of SSD drives working in RAID. At least one drive is intended for parity - one extra bit is added to the data copied on it and in case a main disk stops working, this bit makes it simpler to recalculate the bits of the files on the failed hard disk so that the right information is restored on the new drive added to the RAID. In the mean time, your websites will remain online as all the data will still load from at least one more disk drive. In case you add regular backups to your VPS plan, a copy of your information will be kept on standard hard drives which also function in RAID because we want to make certain that any kind of website content you add will be risk-free at all times. Using multiple hard drives in RAID for all of the main and backup servers enables us to offer fast and reliable Internet hosting service.