RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard disks that work together as one logical unit. The drives could be physical or logical i.e. in the latter case one drive is divided into individual ones through virtualization software. In either case, identical information is stored on all drives and the main benefit of using this kind of a setup is that if a drive fails, the data will remain available on the other ones. Employing a RAID also boosts the performance since the input and output operations will be spread among several drives. There are several kinds of RAID based on how many hard drives are used, whether writing is carried out on all the drives in real time or just on one, and how the information is synchronized between the drives - whether it's recorded in blocks on one drive after another or it is mirrored from one on the others. These factors suggest that the error tolerance as well as the performance between the different RAID types could differ.

RAID in Shared Website Hosting

All content which you upload to your new shared website hosting account will be held on fast SSD drives that operate in RAID-Z. This configuration is built to use the ZFS file system that runs on our cloud Internet hosting platform and it adds one more level of protection for your site content on top of the real-time checksum validation that ZFS uses to guarantee the integrity of the data. With RAID-Z, the information is stored on several disks and at least 1 is a parity disk - whenever information is written on it, an extra bit is added, so in case any drive stops functioning for some 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 functioning of our system will not be interrupted and it'll continue functioning effectively until the faulty drive is replaced and the data is synchronized on it.

RAID in Semi-dedicated Hosting

The SSD drives which are used for saving any website content uploaded to the semi-dedicated hosting accounts which we offer function in RAID-Z. This is a specific setup where one or more drives are employed for parity i.e. the system will add an additional bit to any data copied on such a drive. In case that a disk fails and is substituted with another one, what information will be duplicated on the latter will be a mix calculated between the data on the remaining disks and that on the parity one. This is done to make sure that the data on the new drive shall be correct. Throughout the procedure, the RAID will continue functioning normally and the malfunctioning drive will not affect the adequate operation of your Internet sites in any respect. Using SSDs in RAID-Z is a great addition to the ZFS file system which runs on our advanced cloud platform with regards to preserving the integrity of your files because ZFS uses specific digital identifiers identified as checksums so as to prevent silent data corruption.