RAID, or Redundant Array of Independent Disks, is a technology of saving data on multiple hard drives which operate together as a single logical unit. The drives can be physical or logical i.e. in the second case a single drive is divided into individual ones through virtualization software. In any case, identical data is stored on all of the drives and the key advantage of employing this type of a setup is that in the event that a drive breaks down, the data shall still be available on the remaining ones. Employing a RAID also enhances the overall performance since the input and output operations will be spread among a few drives. There are several kinds of RAID dependant upon how many hard drives are used, whether writing is performed on all of the drives in real time or just on one, and how the data is synced between the hard drives - whether it is recorded in blocks on one drive after another or all of it is mirrored from one on the others. All these factors mean that the error tolerance and the performance between the different RAID types may vary.
RAID in Website Hosting
The SSD drives which our cutting-edge cloud Internet hosting platform employs for storage function in RAID-Z. This sort of RAID is created to work with the ZFS file system which runs on the platform and it employs the so-called parity disk - a specific drive where information located on the other drives is duplicated with an additional bit added to it. If one of the disks fails, your Internet sites shall continue working from the other ones and after we replace the malfunctioning one, the data that will be copied on it will be recovered from what is stored on the other drives as well as the data from the parity disk. This is done in order to be able to recalculate the elements of every file properly and to validate the integrity of the info copied on the new drive. This is one more level of security for the content you upload to your website hosting account together with the ZFS file system which analyzes a unique digital fingerprint for every single file on all the disk drives in real time.
RAID in Semi-dedicated Hosting
If you host your Internet sites in a semi-dedicated hosting account from our company, any content you upload will be held on SSD drives that work in RAID-Z. With this form of RAID, at least 1 of the hard drives is used for parity - when data is synchronized between the disks, an extra bit is included in it on the parity one. The idea behind this is to guarantee the integrity of the info which is copied to a new drive if one of the disks in the RAID stops functioning as the website content being copied on the brand new disk is recalculated from the information on the standard drives and on the parity one. Another advantage of RAID-Z is that even in the event that a drive fails, the system can switch to a different one right away without service disturbances of any kind. RAID-Z adds one more level of security for the content which you upload on our cloud Internet hosting platform in addition to the ZFS file system that uses unique checksums as a way to verify the integrity of each file.
RAID in VPS Hosting
All virtual private server accounts which our company provides are made on physical servers that employ SSD drives working in RAID. At least one drive is intended for parity - one extra bit is included in the information cloned on it and if a main disk fails, this bit makes it easier to recalculate the bits of the files on the damaged disk drive so that the correct info is restored on the new drive included in the RAID. In the mean time, your Internet sites will still be online since all the info will still load from at least one more hard drive. In the event that you add regular backups to your VPS plan, a copy of your information will be stored on standard disk drives which also operate in RAID since we want to make certain that any sort of site content you add will be risk-free at all times. Using multiple drives in RAID for all main and backup servers permits us to offer fast and reliable Internet hosting service.