RAID, or Redundant Array of Independent Disks, is a technology of storing data on several hard disks that operate together as a single logical unit. The drives can be physical or logical i.e. in the second case one drive is divided into independent ones through virtualization software. In any case, identical data is kept on all drives and the main benefit of using this kind of a setup is that in the event that a drive fails, the data shall still be available on the other ones. Having a RAID also enhances the overall performance because the input and output operations will be spread among several drives. There are several kinds of RAID dependant upon how many hard disks are used, whether writing is carried out on all drives in real time or just on a single one, and how the data is synchronized between the drives - whether it is recorded in blocks on one drive after another or all of it is mirrored from one on the others. These factors mean that the fault tolerance and the performance between the different RAID types could differ.

RAID in Web Hosting

The disk drives which we use for storage with our revolutionary cloud hosting platform are not the traditional HDDs, but high-speed solid-state drives (SSD). They work in RAID-Z - a special setup designed for the ZFS file system which we work with. All of the content that you add to the web hosting account will be saved on multiple hard disks and at least one of them will be used as a parity disk. This is a special 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 without service disturbances and the info will be rebuilt on the new drive by recalculating its bits using the data on the parity disk plus that on the other disks. This is done in order to guarantee the integrity of the data and together with the real-time checksum validation that the ZFS file system runs on all drives, you will never need to worry about the loss of any info no matter what.

RAID in Semi-dedicated Hosting

The data uploaded to any semi-dedicated hosting account is stored on SSD drives that function in RAID-Z. One of the drives in type of a configuration is used for parity - whenever data is copied on it, an extra bit is added. In case a disk happens to be flawed, it will be taken out of the RAID without interrupting the operation of the websites as the data will load from the remaining drives, and when a brand new drive is included, the data which will be copied on it will be a mix between the data on the parity disk and data stored on the other drives in the RAID. That is done so as to ensure that the data that is being duplicated is accurate, so as soon as the new drive is rebuilt, it can be included in the RAID as a production one. This is an extra warranty for the integrity of your data as the ZFS file system which runs on our cloud web hosting platform analyzes a unique checksum of all the copies of your files on the various drives to avoid any probability of silent data corruption.

RAID in VPS

The physical servers where we generate virtual private server employ extremely fast SSD drives that will increase the speed of your sites noticeably. The drives work in RAID to guarantee that you won't lose any data due to a power loss or a hardware malfunction. The production servers use a variety of drives where the information is stored 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 site content without loss in the event a main drive stops working. If you use our backup service, your data will be stored on an independent machine that uses standard hard-disk drives and despite the fact that 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 site content at all times. With this setup your info will always be safe because it will be available on multiple disk drives.