RAID, or Redundant Array of Independent Disks, is a technology of storing data on several hard disks that function together as one single logical unit. The drives can be physical or logical i.e. in the second case one single drive is split into independent ones via virtualization software. In any case, identical data is kept on all drives and the key advantage of employing such a setup is that in the event that a drive stops working, the data will remain available on the other ones. Having a RAID also enhances the performance because the input and output operations will be spread among several drives. There are several types of RAID based on how many drives are used, whether writing is carried out on all drives in real time or just on a single one, and how the info is synced between the hard drives - whether it's recorded 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 fault tolerance as well as the performance between the different RAID types can differ.

RAID in Shared Web Hosting

Any content which you upload to your new shared web hosting account will be held on fast SSD drives which function in RAID-Z. This setup is built to use the ZFS file system that runs on our cloud hosting platform and it adds one more level of protection for your website content in addition to the real-time checksum validation which ZFS uses to guarantee the integrity of the data. With RAID-Z, the information is saved on a couple of disks and at least one is a parity disk - whenever info is recorded on it, an extra bit is added, so if any drive fails for whatever reason, the integrity of the info can be verified by recalculating its bits in accordance with what is stored on the production hard drives and on the parity one. With RAID-Z, the operation of our system will never be interrupted and it'll continue working efficiently until the malfunctioning drive is changed and the information is synchronized on it.

RAID in Semi-dedicated Servers

The SSD drives that are used for holding any content uploaded to the semi-dedicated server accounts which we offer operate in RAID-Z. This is a specific setup where one or more disk drives are employed for parity i.e. the system will add an extra bit to any data cloned on this kind of a drive. In the event that a disk fails and is replaced 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 make sure that the information on the new drive shall be correct. During the procedure, the RAID will continue working adequately and the problematic drive will not affect the normal operation of your sites by any means. Using SSDs in RAID-Z is a superb addition to the ZFS file system which runs on our state-of-the-art cloud platform with regards to preserving the integrity of your files as ZFS uses unique digital identifiers known as checksums to avoid silent data corruption.

RAID in VPS Servers

The physical servers where we create VPS server employ high-speed SSD drives that will increase the speed of your websites significantly. The disk drives function in RAID to guarantee that you will not lose any information due to a power loss or a hardware breakdown. The production servers use multiple drives where the information is stored and one disk is used for parity i.e. one bit is added to all data copied on it, which makes it easier to restore the site content without loss in the event a main drive breaks down. If you use our backup service, the data will be kept on a separate machine which uses standard hard-disk drives and though there's no parity one in this case, they are also in a RAID to ensure that we will have a backup of your website content all of the time. With this kind of setup your data will always be safe as it will be available on multiple drives.