Redundant Array of Independent Disks, or RAID, is a way of storing content on multiple hard disk drives at the same time. A RAID could be software or hardware based on the hard drives that are used - physical or logical ones, however what’s common between them is that they all work as one single unit where info is kept. The main advantage of using a RAID is redundancy as the information on all drives will be the same at all times, so even in case some drive fails for whatever reason, the data will still be present on the other drives. The general performance is also enhanced as the reading and writing processes will be split between various drives, so a single one will never be overloaded. There're different sorts of RAIDs where the effectiveness and fault tolerance could differ depending on the exact setup - whether data is written on all of the drives in real time or it's written on one drive and after that mirrored on another, what amount of drives are used for the RAID, etcetera.
RAID in Website Hosting
The cutting-edge cloud hosting platform where all website hosting accounts are created employs quick SSD drives rather than the classic HDDs, and they work in RAID-Z. With this configuration, multiple hard disks work together and at least a single one is a dedicated parity disk. Simply put, when data is written on the other drives, it's duplicated on the parity one adding an extra bit. This is done for redundancy as even in case some drive fails or falls out of the RAID for some reason, the information can be rebuilt and verified thanks to the parity disk and the data recorded on the other ones, therefore absolutely nothing will be lost and there will not be any service interruptions. This is another level of security for your info in addition to the revolutionary ZFS file system that uses checksums to ensure that all the data on our servers is undamaged and is not silently corrupted.
RAID in Semi-dedicated Servers
In case you host your Internet sites within a semi-dedicated server account from our company, all the content you upload will be saved on SSD drives which work in RAID-Z. With this type of RAID, at least 1 of the disks is used for parity - when data is synchronized between the disks, an extra bit is added to it on the parity one. The idea behind this is to guarantee the integrity of the info that is copied to a brand new drive in the event that one of the hard drives in the RAID stops working because the content being copied on the brand new disk is recalculated from the info on the standard drives and on the parity one. Another advantage of RAID-Z is the fact that even in case a drive stops functioning, the system can switch to another one right away without service disruptions of any kind. RAID-Z adds an additional level of safety for the content which you upload on our cloud Internet hosting platform together with the ZFS file system which uses unique checksums to verify the integrity of each file.
RAID in VPS Servers
If you use one of our VPS server plans, any content that you upload will be kept on SSD drives which function in RAID. At least a single drive is intended for parity so as to guarantee the integrity of your data. In simple terms, this is a special drive where information is copied with one bit added to it. If a disk from the RAID breaks down, your Internet sites will continue working and when a new disk substitutes the faulty one, the bits of the data that will be cloned on it are calculated using the healthy and the parity drives. That way, any potential for corrupting data during the process is averted. We also employ standard hard disks that operate in RAID for storing backup copies, so should you add this service to your VPS package, your site content will be saved on multiple drives and you'll never have to worry about its integrity even in the event of multiple drive breakdowns.