RAID, or Redundant Array of Independent Disks, is a technology of storing data on multiple hard disk drives that function together as one single logical unit. The drives can be physical or logical i.e. in the aforementioned case a single drive is divided into independent ones via virtualization software. Either way, the same data is stored on all of the drives and the key benefit of using such a setup is that in case a drive fails, the data shall still be available on the remaining ones. Employing a RAID also improves the overall performance because the input and output operations will be spread among a few drives. There are several kinds of RAID depending on how many hard disks are used, whether writing is performed on all the drives in real time or just on a single one, and how the info is synchronized between the hard drives - whether it is written in blocks on one drive after another or all of it is mirrored from one on the others. All these factors show that the fault tolerance and the performance between the different RAID types can vary.

RAID in Web Hosting

The disk drives which we use for storage with our innovative cloud web hosting platform are not the standard HDDs, but high-speed solid-state drives (SSD). They operate in RAID-Z - a special setup designed for the ZFS file system which we work with. Any content that you add to the web hosting account will be saved on multiple hard drives and at least one shall be used as a parity disk. This is a specific drive where an additional bit is included to any content copied on it. In the event that a disk in the RAID fails, it will be replaced without any service disturbances and the data will be rebuilt 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 to ensure the integrity of the data and along with the real-time checksum validation that the ZFS file system performs on all drives, you won't ever have to worry about losing any information no matter what.

RAID in Semi-dedicated Hosting

The RAID type which we employ for the cloud web hosting platform where your semi-dedicated hosting account shall be created is known as RAID-Z. What's different about it is that at least one of the disks is employed as a parity drive. Simply put, whenever any data is copied on this special disk drive, one more bit is added to it and in case a malfunctioning disk is replaced, the data that will be cloned on it is a combination of the data on the remaining drives in the RAID and that on the parity one. It's done this way to guarantee that the info is intact. During this process, your sites will be up and running normally since RAID-Z allows for a whole drive to fail without causing any service disturbances and it simply uses one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system which uses checksums to guarantee that no data will get silently corrupted on our servers, you'll never have to worry about the integrity of your files.

RAID in VPS Web Hosting

The physical servers where we make virtual private server work with quick SSD drives which will raise the speed of your Internet sites noticeably. The drives function in RAID to make sure that you will not lose any info due to a power loss or a hardware failure. 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 the info copied on it, which makes it much easier to recover the content without any loss in case a main drive breaks down. If you pick our backup service, your data will be saved on an individual machine that uses standard hard-disk drives and although there's no parity one in this case, they are also in a RAID to make sure that we will have a backup of your website content all of the time. With this particular setup your data will always be safe as it will be available on many drives.