RAID, or Redundant Array of Independent Disks, is a technology for storing data on a number hard disk drives which function together as one single logical unit. The drives could be physical or logical i.e. in the second case one drive is divided into individual ones through virtualization software. Either way, identical info is kept on all the drives and the basic benefit of using this type of a setup is that in case a drive stops working, the data will remain available on the remaining ones. Having a RAID also boosts the 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 done on all of the drives in real time or just on one, and how the data is synced between the hard drives - whether it's written in blocks on one drive after another or it is mirrored from one on the others. All these factors suggest that the error tolerance as well as the performance between the different RAID types can differ.

RAID in Shared Hosting

All of the content that you upload to your new shared hosting account will be held on quick SSD drives that work in RAID-Z. This configuration is built to use the ZFS file system that runs on our cloud web hosting platform and it adds another level of security for your site content on top of the real-time checksum authentication which ZFS uses to guarantee the integrity of the data. With RAID-Z, the data is stored on a couple of disks and at least 1 is a parity disk - whenever data is written on it, an extra bit is added, so in case any drive stops functioning for whatever reason, the integrity of the data can be verified by recalculating its bits based on what is stored on the production hard drives and on the parity one. With RAID-Z, the functioning of our system will never be interrupted and it'll continue working efficiently until the problematic drive is replaced and the info is synced on it.

RAID in Semi-dedicated Hosting

The SSD drives which are used for keeping any website content uploaded to the semi-dedicated hosting accounts which we provide operate in RAID-Z. This is a special setup where one or more drives are employed for parity i.e. the system will include an additional bit to any data cloned on such a drive. In the event that a disk fails and is substituted with another one, what data will be cloned on the latter shall be a mix calculated between the data on the other disks and that on the parity one. This is done to ensure that the info on the new drive will be accurate. During the procedure, the RAID will continue operating adequately and the malfunctioning drive will not have an effect on the proper operation of your sites in any way. Working with SSDs in RAID-Z is a fantastic addition to the ZFS file system that runs on our advanced cloud platform with respect to preserving the integrity of your files since ZFS uses special digital identifiers identified as checksums in order to avoid silent data corruption.

RAID in VPS

In case you take advantage of one of our virtual private server solutions, any content that you upload will be kept on SSD drives which work in RAID. At least a single drive is intended for parity so as to ensure the integrity of the data. In simple terms, this is a special drive where data is copied with one bit added to it. If a disk from the RAID fails, your Internet sites will continue working and when a new disk takes the place of the flawed one, the bits of the data that will be cloned on it are calculated using the healthy and the parity drives. By doing this, any probability of corrupting data during the process is avoided. We also employ regular hard drives that operate in RAID for storing backups, so in case you add this service to your VPS plan, your content will be stored on multiple drives and you'll never have to worry about its integrity even in the event of multiple drive breakdowns.