Redundant Array of Independent Disks, or RAID, is a method of storing content on multiple hard disk drives simultaneously. A RAID could be software or hardware depending on the drives that are used - physical or logical ones, still what is common between them is that they all operate as a single unit where data is stored. The top advantage of using a RAID is redundancy since the data on all of the drives is exactly the same all the time, so even if one of the drives fails for whatever reason, the info will still be available on the rest of the drives. The general performance is enhanced as well because the reading and writing processes will be split between multiple drives, so a single one can't be overloaded. There're different types of RAIDs where the functionality and fault tolerance may differ depending on the specific setup - whether info is written on all the drives in real time or it's written on one drive and then mirrored on another, what number of drives are used for the RAID, and many others.

RAID in Cloud Hosting

The disk drives that we use for storage with our top-notch cloud Internet hosting platform are not the standard HDDs, but quick solid-state drives (SSD). They function in RAID-Z - a special setup intended for the ZFS file system that we use. Any content that you upload to your cloud hosting account will be held on multiple drives and at least one shall be employed as a parity disk. This is a specific drive where an additional bit is included to any content copied on it. In case a disk in the RAID stops working, it will be replaced with no service interruptions and the information will be rebuilt on the new drive by recalculating its bits using the data on the parity disk along with that on the other disks. This is done to guarantee the integrity of the data and together with the real-time checksum authentication which the ZFS file system performs on all drives, you won't ever need to concern yourself with losing any data no matter what.

RAID in Semi-dedicated Servers

The SSD drives which are used for keeping any site content uploaded to the semi-dedicated server accounts that we provide function in RAID-Z. This is a specific setup where one or more hard drives are employed for parity i.e. the system will include an additional bit to any data duplicated on this kind of a disk drive. If a disk fails and is substituted with a new one, what information will be duplicated on the latter will be a mix calculated between the data on the remaining disks and that on the parity one. This is done to guarantee that the data on the new drive will be correct. During the process, the RAID will continue operating normally and the faulty drive will not impact the normal operation of your websites in any respect. Using SSDs in RAID-Z is an amazing 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 because ZFS uses special digital identifiers called checksums to prevent 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 hard drives operate in RAID to make sure that you will not lose any information because of a power loss or a hardware failure. The production servers employ many different drives where the information is stored and one disk is used for parity i.e. one bit is added to all of the info copied on it, which makes it much easier to recover the website content without loss in case a main drive fails. If you use our backup service, your info will be kept on a separate machine which uses standard hard-disk drives and even though there's no parity one in this case, they are also in a RAID to guarantee that we will have a backup of your content all the time. With this configuration your data will always be safe since it will be available on a lot of drives.