RAID, which is an acronym of Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that makes it possible for a system to take advantage of several hard drives as one single logical unit. In other words, all of the drives are used as one and the data on all of them is the same. This kind of a configuration has 2 major advantages over using a single drive to save data - the first one is redundancy, so if one drive doesn't work, the information will be accessed through the others, and the second is improved performance as the input/output, or reading/writing operations will be spread among a number of drives. There're different RAID types depending on the number of drives are used, if reading and writing are both performed from all drives concurrently, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. Based on the particular setup, the fault tolerance and the performance may differ.
RAID in Cloud Hosting
All of the content that you upload to your new cloud hosting account will be held on fast SSD drives which operate in RAID-Z. This configuration is built to use the ZFS file system which runs on our cloud Internet hosting platform and it adds another level of security for your content in addition to the real-time checksum authentication which ZFS uses to ensure the integrity of the data. With RAID-Z, the data is saved on several disks and at least one of them is a parity disk - whenever data is recorded on it, an extra bit is added, so in the event that any drive stops functioning for whatever reason, the integrity of the data can be verified by recalculating its bits in accordance with what is kept on the production disks and on the parity one. With RAID-Z, the functioning of our system won't be interrupted and it will continue operating effectively until the problematic drive is replaced and the information is synced on it.
RAID in Semi-dedicated Hosting
The SSD drives which are used for storing any content uploaded to the semi-dedicated hosting accounts that we provide operate in RAID-Z. This is a specific setup where one or more hard drives are used for parity i.e. the system will include an additional bit to any data duplicated on this kind of a drive. If a disk fails and is substituted with a new one, what info will be copied on the latter shall be a combination calculated between the data on the remaining disks and that on the parity one. This is done to make sure that the data on the new drive will be accurate. Throughout the process, the RAID will continue working adequately and the problematic drive won't impact the adequate operation of your Internet sites at all. Using SSDs in RAID-Z is an impressive addition to the ZFS file system which runs on our advanced cloud platform with regards to preserving the integrity of your files because ZFS uses specific digital identifiers known as checksums in order to prevent silent data corruption.
RAID in VPS Web Hosting
The physical servers where we make virtual private server use super fast SSD drives which will raise the speed of your sites noticeably. The drives operate in RAID to make sure that you will not lose any data as a result of a power loss or a hardware malfunction. The production servers work with multiple drives where the info is kept and one disk is used for parity i.e. one bit is added to all of the info copied on it, which makes it much easier to restore the site content without any loss in case a main drive breaks down. If you choose our backup service, your data will be stored on a separate machine which uses standard hard-disk drives and despite the fact that there isn't a parity one in this case, they are also in a RAID to guarantee that we will have a backup of your content all of the time. With this particular configuration your data will always be safe because it will be available on many drives.