Redundant Array of Independent Disks, or RAID, is a method of keeping content on several hard disks simultaneously. A RAID could be software or hardware depending on the hard drives that are used - physical or logical ones, yet what’s common between them is that they all perform as one single unit where data is stored. The biggest advantage of employing a RAID is redundancy since the data on all the drives is the same at all times, so even if a drive fails for whatever reason, the info will still be available on the rest of the drives. The general performance is also enhanced as the reading and writing processes can be split between multiple drives, so a single one won't be overloaded. There are different types of RAIDs where the effectiveness and fault tolerance could differ depending on the particular setup - whether info is written on all drives in real time or it's written on a single drive and then mirrored on another, the number of drives are used for the RAID, etc.

RAID in Shared Web Hosting

The disk drives that we employ for storage with our state-of-the-art cloud hosting platform are not the standard HDDs, but super fast solid-state drives (SSD). They work in RAID-Z - a special setup intended for the ZFS file system that we work with. All of the content that you add to the shared web hosting account will be held on multiple hard disks and at least one shall be employed as a parity disk. This is a specific drive where an extra bit is included to any content copied on it. If a disk in the RAID stops functioning, it will be replaced with no service disturbances and the info will be recovered on the new drive by recalculating its bits thanks to the data on the parity disk along with that on the other disks. This is done so as to ensure the integrity of the info and together with the real-time checksum authentication which the ZFS file system executes on all drives, you won't ever have to be concerned about the loss of any data no matter what.

RAID in Semi-dedicated Hosting

The SSD drives that are used for holding any website content uploaded to the semi-dedicated hosting accounts which we provide work in RAID-Z. This is a special configuration where one or more drives are used for parity i.e. the system will add an extra bit to any data cloned on such a disk drive. In the event that a disk fails and is replaced with a new one, what information will be cloned on the latter will be a mix calculated between the data on the remaining drives and that on the parity one. This is done to ensure that the info on the new drive will be correct. During the process, the RAID will continue functioning adequately and the malfunctioning drive won't impact the proper operation of your sites at all. Using SSDs in RAID-Z is an impressive addition to the ZFS file system which runs on our revolutionary cloud platform with respect to preserving the integrity of your files since ZFS uses specific digital identifiers referred to as checksums in order to prevent silent data corruption.

RAID in VPS

The physical servers where we make virtual private server employ quick SSD drives that will increase the speed of your sites considerably. The drives work in RAID to ensure that you won't lose any info because of a power loss or a hardware failure. The production servers employ a variety of drives where the information is saved and one disk is used for parity i.e. one bit is added to all of the info copied on it, that makes it easier to restore the site content without loss in the event a main drive breaks down. In case you pick our backup service, your info will be stored on an independent machine which uses standard hard-disk drives and though there's no parity one in this case, they are also in a RAID to guarantee that we will have a backup copy of your website content all of the time. With this particular configuration your info will always be safe as it will be available on multiple drives.