RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which permits a system to use many hard drives as a single logical unit. To put it differently, all the drives are used as one and the info on all of them is identical. This type of a configuration has two major advantages over using a single drive to keep data - the first is redundancy, so in case one drive breaks down, the info will be accessed from the remaining ones, and the second one is improved performance as the input/output, or reading/writing operations will be spread among different drives. You can find different RAID types depending on how many drives are used, if reading and writing are both handled from all the drives at the same time, if data is written in blocks on one drive after another or is mirrored between drives in the same time, etc. According to the particular setup, the error tolerance and the performance may differ.

RAID in Hosting

Our revolutionary cloud web hosting platform where all hosting accounts are created uses fast NVMe drives instead of the traditional HDDs, and they function in RAID-Z. With this configuration, multiple hard drives operate together and at least one of them is a dedicated parity disk. Simply put, when data is written on the rest of the 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 saved on the other ones, so practically nothing will be lost and there will not be any service interruptions. This is one more level of protection for your info together with the state-of-the-art ZFS file system that uses checksums to ensure that all of the data on our servers is undamaged and is not silently corrupted.

RAID in Semi-dedicated Hosting

The information uploaded to any semi-dedicated hosting account is kept on NVMe drives which operate in RAID-Z. One of the drives in type of a configuration is used for parity - each time data is copied on it, an additional bit is added. In case a disk turns out to be defective, it will be removed from the RAID without interrupting the operation of the websites as the data will load from the rest of the drives, and when a brand new drive is included, the info that will be cloned on it will be a combination between the information on the parity disk and data kept on the other drives in the RAID. This is done in order to ensure that the information which is being duplicated is accurate, so the moment the new drive is rebuilt, it can be included in the RAID as a production one. This is an additional guarantee for the integrity of your info because the ZFS file system which runs on our cloud Internet hosting platform analyzes a unique checksum of all the copies of the files on the separate drives so as to avoid any possibility of silent data corruption.