Redundant Array of Independent Disks, or RAID, is a way of saving content on a number of hard disks at the same time. A RAID could be software or hardware depending on the hard drives that are used - physical or logical ones, still what’s common between them is that they all work as one single unit where data is stored. The top advantage of using a RAID is redundancy because the information on all drives will be exactly the same at all times, so even if one of the drives fails for whatever reason, the data will still be present on the rest of the drives. The overall performance will also improve as the reading and writing processes could be split between various drives, so a single one will never be overloaded. There are different types of RAIDs where the efficiency and fault tolerance may differ depending on the specific setup - whether data is written on all the drives in real time or it is written on one drive and after that mirrored on another, what number of drives are used for the RAID, etc.
RAID in Shared Web Hosting
Our advanced cloud hosting platform where all shared web hosting accounts are made uses quick SSD drives instead of the traditional HDDs, and they function in RAID-Z. With this configuration, numerous hard disk drives function together and at least 1 is a dedicated parity disk. In simple terms, when data is written on the other drives, it is duplicated on the parity one adding an extra bit. This is done for redundancy as even in case a drive fails or falls out of the RAID for some reason, the data can be rebuilt and verified thanks to the parity disk and the data recorded on the other ones, which means that not a thing will be lost and there will be no service disorders. This is another level of protection for your information together with the cutting-edge ZFS file system that uses checksums to guarantee that all of the data on our servers is undamaged and is not silently corrupted.
RAID in Semi-dedicated Servers
The info uploaded to any semi-dedicated server account is saved on SSD drives that function in RAID-Z. One of the drives in this kind of a setup is used for parity - each time data is copied on it, an extra bit is added. In case a disk happens to be defective, it will be removed from the RAID without disturbing the operation of the Internet sites since the data will load from the rest of the drives, and when a new drive is included, the information which will be cloned on it will be a blend between the info on the parity disk and data kept on the other drives in the RAID. That is done to guarantee that the info which is being cloned is accurate, so the moment the new drive is rebuilt, it could be integrated into the RAID as a production one. This is an additional warranty for the integrity of your info because the ZFS file system that runs on our cloud web hosting platform compares a special checksum of all copies of the files on the various drives in order to avoid any possibility of silent data corruption.
RAID in VPS Servers
All VPS server accounts which we offer are created on physical servers that employ SSD drives functioning in RAID. At least one drive is used for parity - one additional bit is included in the info cloned on it and if a main disk fails, this bit makes it easier to recalculate the bits of the files on the failed hard disk so that the correct data is recovered on the new drive added to the RAID. In the mean time, your websites will stay online since all the information will still load from at least one other hard disk. If you add regular backups to your VPS plan, a copy of the info will be saved on standard hard drives that also work in RAID since we would like to make sure that any content you upload will be safe and sound at all times. Employing multiple hard disks in RAID for all the main and backup servers enables us to offer fast and reliable web hosting service.