RAID, or Redundant Array of Independent Disks, is a technology for storing data on several hard drives which work together as a single logical unit. The drives can be physical or logical i.e. in the second case one drive is split into separate ones via virtualization software. In any case, exactly the same info is saved on all the drives and the main advantage of using this kind of a setup is that if a drive stops working, the data will remain available on the remaining ones. Having a RAID also boosts the overall performance because the input and output operations will be spread among a couple of drives. There are several kinds of RAID based on how many hard drives are used, whether writing is performed on all drives in real time or just on one, and how the data 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 these factors imply that the fault tolerance as well as the performance between the different RAID types could differ.

RAID in Cloud Web Hosting

All of the content that you upload to your new cloud web hosting account will be placed on fast SSD drives which work in RAID-Z. This configuration is built to employ the ZFS file system that runs on our cloud Internet hosting platform and it adds an additional level of protection for your site content on top of the real-time checksum authentication that ZFS uses to guarantee the integrity of the data. With RAID-Z, the data is saved on several disks and at least 1 is a parity disk - whenever information is recorded on it, an extra bit is added, so in case any drive stops functioning for whatever reason, the stability of the information can be verified by recalculating its bits based on what is kept on the production drives and on the parity one. With RAID-Z, the operation of our system will not be interrupted and it will continue operating effectively until the problematic drive is changed and the data is synchronized on it.

RAID in Semi-dedicated Servers

The RAID type which we use for the cloud hosting platform where your semi-dedicated server account shall be created is referred to as RAID-Z. What's different about it is that at least 1 of the disks is used as a parity drive. Put simply, whenever any data is copied on this special hard drive, one more bit is added to it and if a malfunctioning disk is replaced, the information which will be copied on it is a mix of the data on the other hard 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 Internet sites will be functioning normally as RAID-Z allows for a whole drive to fail without any service disruptions 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 can get silently corrupted on our servers, you won't ever have to worry about the integrity of your files.

RAID in VPS Servers

In case you take advantage of one of our VPS server plans, any content you upload will be saved on SSD drives which operate in RAID. At least one drive is employed for parity so as to ensure the integrity of the data. In simple terms, this is a special drive where information is copied with one bit added to it. In case a disk part of the RAID stops working, your websites will continue working and when a new disk replaces the malfunctioning one, the bits of the data that will be duplicated on it are calculated using the healthy and the parity drives. This way, any probability of corrupting data throughout the process is averted. We also employ conventional hard drives which operate in RAID for storing backup copies, so in case you add this service to your VPS plan, your website content will be saved on multiple drives and you won't ever need to worry about its integrity even in the event of multiple drive breakdowns.