Redundant Array of Independent Disks, or RAID, is a method of storing content on several hard disks simultaneously. A RAID can be software or hardware based on the drives that are used - physical or logical ones, still what is common between them is the fact that they all work as one single unit where data is saved. The top advantage of employing a RAID is redundancy because the info on all drives is exactly the same all the time, so even if a drive fails for whatever reason, the information will still be present on the rest of the drives. The overall performance is also enhanced since the reading and writing processes will be split between various drives, so a single one will not be overloaded. There are different sorts of RAIDs where the functionality and fault tolerance may differ depending on the particular setup - whether information is written on all drives real-time or it is written on a single drive and then mirrored on another, what number of drives are used for the RAID, and so on.
RAID in Website Hosting
Any content which you upload to your new website hosting account will be stored on quick SSD drives that work in RAID-Z. This setup is built to employ the ZFS file system which runs on our cloud Internet hosting platform and it adds one more level of protection for your content on top of the real-time checksum validation that ZFS uses to guarantee the integrity of the data. With RAID-Z, the info is saved on a couple of disks and at least one is a parity disk - whenever info is written on it, an extra bit is added, so if any drive stops functioning for some reason, the stability of the data can be verified by recalculating its bits based on what is saved on the production hard drives and on the parity one. With RAID-Z, the operation of our system will never be interrupted and it will continue working smoothly until the faulty drive is changed and the info is synchronized on it.