RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard disk drives that work together as one single logical unit. The drives can be physical or logical i.e. in the second case one single drive is split into separate ones using virtualization software. Either way, identical info is stored on all drives and the key benefit of employing this kind of a setup is that in case a drive stops working, the data will still be available on the other ones. Having a RAID also improves the performance because the input and output operations will be spread among a few drives. There are several types of RAID dependant upon how many drives are used, whether writing is performed on all of the drives in real time or just on one, and how the info is synchronized between the drives - whether it is written in blocks on one drive after another or it is mirrored from one on the others. All of these factors indicate that the error tolerance as well as the performance between the different RAID types can differ.

RAID in Cloud Web Hosting

The hard drives that we employ for storage with our state-of-the-art cloud hosting platform are not the traditional HDDs, but super fast solid-state drives (SSD). They work in RAID-Z - a special setup intended for the ZFS file system that we use. All the content that you add to your cloud web hosting account will be kept on multiple disk drives and at least one of them will be used as a parity disk. This is a special drive where a further bit is added to any content copied on it. In the event that a disk in the RAID stops functioning, it'll be replaced without any service interruptions and the information will be recovered on the new drive by recalculating its bits using the data on the parity disk plus that on the remaining disks. This is done so as to ensure the integrity of the info and along with the real-time checksum verification that the ZFS file system executes on all drives, you'll never have to concern yourself with the loss of any data no matter what.

RAID in Semi-dedicated Hosting

In case you host your websites within a semi-dedicated hosting account from our company, any content you upload will be saved on SSD drives that work in RAID-Z. With this form of RAID, at least one of the drives is used for parity - when data is synced between the hard drives, an extra bit is included in it on the parity one. The reasoning behind this is to ensure the integrity of the info that is cloned to a new drive if one of the disks in the RAID stops working because the content being copied on the brand new disk is recalculated from the information on the standard drives and on the parity one. An additional advantage of RAID-Z is the fact that even if a drive stops functioning, the system could switch to another one promptly without service interruptions of any sort. RAID-Z adds an additional 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 in order to validate the integrity of each and every file.

RAID in VPS

The physical servers where we create virtual private server use fast SSD drives which will increase the speed of your sites substantially. The disk drives operate in RAID to ensure that you won't lose any info due to a power loss or a hardware breakdown. The production servers work with many different drives where the info is saved and one disk is used for parity i.e. one bit is added to all the info copied on it, which makes it easier to restore the content without loss in case a main drive fails. In case you take advantage of our backup service, the info will be saved on an individual machine that 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 of your website content all the time. With this particular configuration your info will always be safe since it will be available on a lot of drives.