Redundant Array of Independent Disks, or RAID, is a method of storing content on multiple hard disk drives at the same time. A RAID can be software or hardware depending on the hard drives that are used - physical or logical ones, still what is common between them is that they all function as just a single unit where info is kept. The key advantage of using a RAID is redundancy as the information on all drives shall be the same all the time, so even in case a drive fails for some reason, the information will still be available on the rest of the drives. The general performance will also improve because the reading and writing processes can be split between a number of drives, so a single one will never be overloaded. There are different kinds of RAIDs where the functionality and fault tolerance may vary according to the exact setup - whether information is written on all drives in real time or it's written on one drive and afterwards mirrored on another, what number of drives are used for the RAID, and many others.
RAID in Website Hosting
All the content that you upload to your new website hosting account will be saved on fast SSD drives which function in RAID-Z. This setup is built to work with the ZFS file system which runs on our cloud Internet hosting platform and it adds one more level of security for your site content on top of the real-time checksum verification that ZFS uses to ensure the integrity of the data. With RAID-Z, the info is saved on a couple of disks and at least one of them is a parity disk - whenever information is written on it, an additional bit is added, so in the event that any drive stops functioning for some reason, the stability of the data can be verified by recalculating its bits in accordance with what is stored on the production drives and on the parity one. With RAID-Z, the operation of our system won't be interrupted and it'll continue working smoothly until the malfunctioning drive is replaced and the data is synchronized on it.
RAID in Semi-dedicated Servers
The RAID type that we use for the cloud hosting platform where your semi-dedicated server account will be created is named RAID-Z. What's different about it is that at least 1 of the disks is employed as a parity drive. Put simply, whenever any data is cloned on this specific drive, one more bit is added to it and in the event that a malfunctioning disk is changed, the data which will be duplicated on it is a mix of the data on the other drives in the RAID and that on the parity one. This is done to guarantee that the information is intact. Throughout this process, your sites will be functioning normally as RAID-Z allows for a whole drive to fail without causing any service interruptions and it simply uses one of the remaining ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to warrant that no data shall get silently corrupted on our servers, you'll never need to worry about the integrity of your files.
RAID in VPS Servers
All VPS server accounts which our company offers are generated on physical servers that take advantage of SSD drives operating in RAID. At least one drive is employed for parity - one extra bit is added to the data cloned on it and if a main disk fails, this bit makes it simpler to recalculate the bits of the files on the damaged drive so that the accurate data is recovered on the new drive added to the RAID. In the mean time, your sites will stay online since all the data will still load from at least one other drive. In the event that you add routine backups to your VPS plan, a copy of your data will be stored on standard disk drives that also function in RAID since we would like to make certain that any sort of website content you upload will be protected all the time. Working with multiple hard drives in RAID for all the main and backup servers permits us to offer fast and reliable hosting service.