What's RAID? How exactly does RAID work? Find out about the pros of using a RAID-equipped server.
RAID, or Redundant Array of Independent Disks, is a technology for keeping data on multiple hard disk drives that operate together as a single logical unit. The drives can be physical or logical i.e. in the latter case one single drive is split into independent ones through 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 breaks down, the data will still be available on the remaining ones. Using a RAID also enhances the performance because the input and output operations will be spread among several drives. There are several types of RAID depending on how many hard drives are used, whether writing is carried out on all of the drives in real time or just on a single one, and how the info is synchronized between the hard drives - whether it's written in blocks on one drive after another or it is mirrored from one on the others. These factors indicate that the fault tolerance as well as the performance between the different RAID types may differ.
RAID in Semi-dedicated Hosting
The SSD drives which are used for saving any website content uploaded to the semi-dedicated hosting accounts that we offer function in RAID-Z. This is a specific configuration where one or more disk drives are used for parity i.e. the system will include an additional bit to any data copied on such a hard drive. In case that a disk fails and is substituted with another one, what data will be copied on the latter will be a combination calculated between the data on the remaining disks and that on the parity one. This is done to guarantee that the info on the new drive will be correct. Throughout the process, the RAID will continue working adequately and the problematic drive will not have an impact on the adequate operation of your Internet sites by any means. Working with SSDs in RAID-Z is a superb addition to the ZFS file system which runs on our revolutionary cloud platform in terms of preserving the integrity of your files because ZFS uses specific digital identifiers known as checksums so as to prevent silent data corruption.