Redundant Array of Independent Disks, or RAID, is a method of saving content on a number of hard disks concurrently. A RAID can be software or hardware based on the hard drives that are used - physical or logical ones, however what is common between them is that they all operate as just one single unit where information is saved. The key advantage of using a RAID is redundancy as the info on all drives will be identical all the time, so even if some drive fails for whatever reason, the data will still be available on the other drives. The general performance is enhanced as well because the reading and writing processes can be split between different drives, so a single one will not be overloaded. There are different kinds of RAIDs where the functionality and fault tolerance can vary according to the specific setup - whether your data is written on all of the drives real-time or it's written on a single drive and after that mirrored on another, what number of drives are used for the RAID, etc.
RAID in Website Hosting
All the content that you upload to your new website hosting account will be placed on fast SSD drives that operate in RAID-Z. This configuration 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 site content in addition to the real-time checksum verification which ZFS uses to guarantee the integrity of the data. With RAID-Z, the info is stored on several disks and at least one of them is a parity disk - whenever info is recorded on it, an additional bit is added, so if any drive stops working for whatever 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 functioning of our system will never be interrupted and it'll continue functioning effectively until the malfunctioning drive is changed and the data is synced on it.
RAID in Semi-dedicated Hosting
The RAID type that we employ for the cloud web hosting platform where your semi-dedicated hosting account shall be created is referred to as RAID-Z. What is different about it is that at least one of the disks is used as a parity drive. Simply put, whenever any data is duplicated on this special hard drive, one more bit is added to it and in case a problematic disk is changed, the data that will be copied on it is a mix of the data on the other hard drives in the RAID and that on the parity one. This is done to ensure that the information is intact. Throughout this process, your websites will be functioning normally because RAID-Z makes it possible for a whole drive to fail without causing any service interruptions and it simply works by using one of the remaining ones as the main production drive. Using RAID-Z together with the ZFS file system which uses checksums to ensure that no data shall get silently corrupted on our servers, you won't have to worry about the integrity of your files.
RAID in VPS Hosting
In case you use one of our virtual private server plans, any content you upload will be saved on SSD drives that function in RAID. At least 1 drive is used 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 stops working, your Internet sites will continue working and when a new disk substitutes the flawed one, the bits of the data that will be cloned on it are calculated by using the healthy and the parity drives. By doing this, any chance of corrupting data during the process is averted. We also use regular hard disks which work in RAID for storing backups, so in case you add this service to your VPS package, your content will be stored on multiple drives and you won't ever need to worry about its integrity even in the event of multiple drive breakdowns.