RAID, or Redundant Array of Independent Disks, is a technology for saving data on a number hard disk drives that function together as one logical unit. The drives can be physical or logical i.e. in the latter case a single drive is divided into separate ones through virtualization software. In either case, identical data is saved on all of the drives and the main benefit of employing this kind of a setup is that in case a drive stops working, the data will still be available on the remaining ones. Using a RAID also boosts the overall performance since the input and output operations will be spread among a number of drives. There are several kinds of RAID dependant upon how many drives are used, whether writing is performed on all of the drives in real time or just on a single one, and how the information is synchronized between the hard drives - whether it is written in blocks on one drive after another or it is mirrored from one on the others. All of these factors show that the error tolerance as well as the performance between the different RAID types can vary.

RAID in Cloud Hosting

The SSD drives which our cutting-edge cloud hosting platform uses for storage operate in RAID-Z. This kind of RAID is designed to work with the ZFS file system which runs on the platform and it employs the so-called parity disk - a special drive where info saved on the other drives is copied with an extra bit added to it. In the event that one of the disks fails, your sites will continue working from the other ones and after we replace the faulty one, the info which will be copied on it will be rebuilt from what is stored on the other drives together with the info from the parity disk. This is performed in order to be able to recalculate the elements of each file properly and to confirm the integrity of the data copied on the new drive. This is an additional level of security for the content that you upload to your cloud hosting account together with the ZFS file system that compares a special digital fingerprint for each file on all hard drives in real time.

RAID in Semi-dedicated Hosting

The SSD drives which are used for keeping any site content uploaded to the semi-dedicated hosting accounts which we provide function in RAID-Z. This is a specific configuration where one or more disk drives are employed for parity i.e. the system will add an additional bit to any data duplicated on this kind of a hard drive. In case that a disk fails and is substituted with another one, what data will be copied on the latter will be a mix calculated between the data on the other disks and that on the parity one. This is done to ensure that the info on the new drive will be correct. Throughout the process, the RAID will continue operating normally and the problematic drive will not have an effect on the normal operation of your sites in any way. Working with SSDs in RAID-Z is an excellent addition to the ZFS file system which runs on our cutting-edge cloud platform with regard to preserving the integrity of your files as ZFS uses unique digital identifiers referred to as checksums so as to avoid silent data corruption.

RAID in VPS

All virtual private server accounts that we offer are generated on physical servers which employ SSD drives working in RAID. At least 1 drive is intended for parity - one extra bit is added to the information cloned on it and if a main disk breaks down, this bit makes it easier to recalculate the bits of the files on the failed hard disk so that the correct information is restored on the new drive included in the RAID. In the mean time, your sites will stay online as all the info will still load from at least one other hard disk. If you add regular backups to your VPS plan, a copy of the information will be kept on standard disk drives that also work in RAID since we want to make certain that any kind of website content you upload will be safe and sound all of the time. Using multiple drives in RAID for all the main and backup servers permits us to offer fast and reliable web hosting service.