RAID, or Redundant Array of Independent Disks, is a technology of saving data on a number hard disk drives that function together as one logical unit. The drives could be physical or logical i.e. in the latter case one single drive is divided into independent ones via virtualization software. In either case, the very same info is stored on all drives and the key advantage of using this kind of a setup is that in the event that a drive fails, the data will still be available on the other ones. Having a RAID also improves the 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 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 synced between the drives - whether it is written in blocks on one drive after another or all of it is mirrored from one on the others. All of these factors show that the error tolerance and the performance between the various RAID types may differ.

RAID in Shared Hosting

Our advanced cloud Internet hosting platform where all shared hosting accounts are created employs fast SSD drives instead of the standard HDDs, and they operate in RAID-Z. With this setup, a number of hard disks operate together and at least one of them is a dedicated parity disk. Put simply, when data is written on the rest of the drives, it is duplicated on the parity one adding an extra bit. This is performed for redundancy as even if a drive fails or falls out of the RAID for some reason, the info can be rebuilt and verified thanks to the parity disk and the data stored on the other ones, therefore nothing will be lost and there will not be any service interruptions. This is another level of protection for your information together with the cutting-edge ZFS file system that uses checksums to guarantee that all the data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Hosting

The SSD drives which are used for holding any site content uploaded to the semi-dedicated hosting accounts which we offer operate in RAID-Z. This is a special setup where one or more drives are used for parity i.e. the system will add an additional bit to any data cloned on such a drive. In the event that a disk fails and is substituted with a new one, what data will be duplicated on the latter will be a combination calculated between the data on the other hard disks and that on the parity one. This is done to ensure that the information on the new drive will be correct. Throughout the process, the RAID will continue functioning normally and the problematic drive won't have an effect on the proper operation of your Internet sites in any respect. Working with SSDs in RAID-Z is an impressive addition to the ZFS file system which runs on our top-notch cloud platform with regards to preserving the integrity of your files since ZFS uses unique digital identifiers referred to as checksums in order to avoid silent data corruption.

RAID in VPS

In case you take advantage of one of our virtual private server packages, any content which you upload will be stored on SSD drives which work in RAID. At least one drive is intended for parity to guarantee the integrity of your information. In simple terms, this is a special drive where data is copied with one bit added to it. In case a disk in the RAID breaks down, your sites will continue working and when a new disk replaces the faulty one, the bits of the information that will be duplicated on it are calculated using the healthy and the parity drives. By doing this, any possibility of corrupting data during the process is averted. We also employ ordinary hard disk drives that function in RAID for storing backup copies, so should you add this service to your VPS package, your content will be stored on multiple drives and you will never have to worry about its integrity even in the event of multiple drive failures.