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 multiple hard drives as a single logical unit. Simply put, all drives are used as one and the data on all of them is identical. Such a setup has two key advantages over using just a single drive to keep data - the first is redundancy, so in the event that one drive fails, the data will be accessible from the remaining ones, and the second is improved performance as the input/output, or reading/writing operations will be distributed among different drives. You can find different RAID types based on what number of drives are employed, whether reading and writing are both handled from all of the 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. According to the particular setup, the error tolerance and the performance vary.
RAID in Cloud Hosting
All the content which you upload to your new cloud hosting account will be saved 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 protection for your site content on top of the real-time checksum authentication that ZFS uses to ensure the integrity of the data. With RAID-Z, the info is stored on a couple of disks and at least one of them is a parity disk - whenever info is written on it, an additional bit is added, so in case any drive stops functioning for whatever reason, the integrity of the info can be verified by recalculating its bits in accordance with what is stored on the production hard drives and on the parity one. With RAID-Z, the operation of our system won't be interrupted and it will continue operating effectively until the malfunctioning drive is replaced and the info is synced on it.
RAID in Semi-dedicated Hosting
The SSD drives which are used for storing any site content uploaded to the semi-dedicated hosting accounts which we offer operate in RAID-Z. This is a special setup where one or more disk drives are used for parity i.e. the system will add an additional bit to any data copied on this type of a drive. If a disk fails and is substituted with a new one, what info will be duplicated on the latter shall be a combination calculated between the data on the other hard 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 operating adequately and the problematic drive will not have an effect on the proper operation of your Internet sites at all. Working with SSDs in RAID-Z is an outstanding addition to the ZFS file system that runs on our revolutionary cloud platform with regards to preserving the integrity of your files because ZFS uses specific digital identifiers called checksums to prevent silent data corruption.
All virtual private server accounts which our company provides are created on physical servers which take advantage of SSD drives working in RAID. At least one drive is used for parity - one additional bit is added to the information copied on it and if a main disk stops working, this bit makes it simpler to recalculate the bits of the files on the damaged hard disk so that the correct information is restored on the new drive included in the RAID. At the same time, your websites will remain online as all the info will still load from at least 1 more hard disk. In case you add routine backups to your VPS package, a copy of your data will be kept on standard disk drives that also function in RAID as we would like to make certain that any site content you upload will be safe and sound all of the time. Working with multiple hard drives in RAID for all of the main and backup servers permits us to offer fast and reliable Internet hosting service.