Redundant Array of Independent Disks, or RAID, is a method of saving content on multiple hard disk drives at the same time. A RAID can be software or hardware based on the HDDs which are used - physical or logical ones, but what’s common between them is the fact that they all function as a single unit where information is stored. The main advantage of employing a RAID is redundancy as the information on all the drives is identical all of the time, so even in case one of the drives fails for whatever reason, the information will still be present on the other drives. The overall performance is also enhanced as the reading and writing processes will be split between a number of drives, so a single one won't be overloaded. There are different types of RAIDs where the performance and fault tolerance may vary depending on the particular setup - whether information is written on all the drives in real time or it's written on a single drive and then mirrored on another, what number of drives are used for the RAID, and many others.
RAID in Shared Website Hosting
All the content which you upload to your new shared website hosting account will be stored on quick SSD drives that work in RAID-Z. This setup is built to use the ZFS file system which runs on our cloud Internet hosting platform and it adds another level of security for your website content on top of the real-time checksum validation that ZFS uses to guarantee the integrity of the data. With RAID-Z, the data is saved on a number of disks and at least one is a parity disk - whenever information is recorded on it, an additional bit is added, so in the event that any drive stops functioning for some reason, the stability of the info can be verified by recalculating its bits based on what is stored on the production drives and on the parity one. With RAID-Z, the operation of our system will never be interrupted and it'll continue functioning effectively until the malfunctioning drive is replaced and the info is synced on it.