RAID, which is an acronym of Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that allows a system to use a number of hard drives as a single logical unit. Simply put, all of the drives are used as one and the info on all of them is identical. Such a setup has 2 huge advantages over using a single drive to keep data - the first is redundancy, so in case one drive stops working, the data will be accessed through the remaining ones, and the second is better performance since the input/output, or reading/writing operations will be spread among several drives. There are different RAID types in accordance with what number of drives are employed, whether reading and writing are both performed from all drives simultaneously, if data is written in blocks on one drive after another or is mirrored between drives in the same time, etc. Determined by the exact setup, the error tolerance and the performance vary.
RAID in Shared Web Hosting
All content that you upload to your new shared web hosting account will be stored on quick SSD drives which function in RAID-Z. This setup is built to use the ZFS file system that runs on our cloud web hosting platform and it adds an additional 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 info is stored on several disks and at least one is a parity disk - whenever information is recorded on it, an extra bit is added, so in the event that any drive fails for whatever reason, the integrity of the information can be verified by recalculating its bits in accordance with what is stored on the production disks and on the parity one. With RAID-Z, the operation of our system will never be interrupted and it will continue working efficiently until the faulty drive is replaced and the info is synced on it.
RAID in Semi-dedicated Servers
In case you host your websites inside a semi-dedicated server account from our firm, all of the content you upload will be stored on SSD drives that work in RAID-Z. With this type of RAID, at least 1 of the drives is employed for parity - when data is synced between the drives, an extra bit is added to it on the parity one. The idea behind this is to ensure the integrity of the information which is copied to a new drive in case one of the drives in the RAID stops functioning because the content being copied on the new disk is recalculated from the info on the standard hard drives and on the parity one. Another advantage of RAID-Z is the fact that even if a drive stops functioning, the system could switch to another 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 hosting platform in addition to the ZFS file system that uses unique checksums as a way to authenticate the integrity of every single file.
RAID in VPS Servers
The physical servers where we generate VPS server use extremely fast SSD drives which will raise the speed of your sites considerably. The drives function in RAID to guarantee that you will not lose any data because of a power loss or a hardware malfunction. The production servers work with many different drives where the data is kept and one disk is used for parity i.e. one bit is added to all the data copied on it, which makes it much easier to recover the website content without loss if a main drive stops working. If you pick our backup service, your info will be kept on a separate machine that uses standard hard-disk drives and even 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 content all the time. With this particular setup your information will always be safe because it will be available on several disk drives.