RAID, which stands 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. In other words, all the drives are used as one and the data on all of them is identical. This kind of a setup has two huge advantages over using a single drive to store data - the first one is redundancy, so if one drive stops working, the data will be accessed from the others, and the second is better performance because the input/output, or reading/writing operations will be distributed among several drives. There're different RAID types in accordance with what number of drives are employed, whether reading and writing are both done from all the drives concurrently, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. Depending on the particular setup, the fault tolerance and the performance could differ.
RAID in Cloud Web Hosting
The SSD drives that our cutting-edge cloud Internet hosting platform uses for storage operate in RAID-Z. This kind of RAID is designed to work with the ZFS file system that runs on the platform and it employs the so-called parity disk - a special drive where info located on the other drives is cloned with an extra bit added to it. If one of the disks stops functioning, your websites shall continue working from the other ones and after we replace the bad one, the data which will be duplicated on it will be rebuilt from what is stored on the remaining drives as well as the data from the parity disk. This is done in order to be able to recalculate the elements of each file adequately and to validate the integrity of the information duplicated on the new drive. This is another level of security for the content that you upload to your cloud web hosting account in addition to the ZFS file system that analyzes a special digital fingerprint for each and every file on all the hard drives in real time.
RAID in Semi-dedicated Hosting
In case you host your websites inside a semi-dedicated hosting account from our firm, any content that you upload will be held on SSD drives which work in RAID-Z. With this form of RAID, at least one of the disks is used for parity - when data is synchronized between the hard drives, an extra bit is included in it on the parity one. The idea behind this is to ensure the integrity of the information that is duplicated to a new drive in case one of the hard drives in the RAID stops functioning because the website content being copied on the brand new disk is recalculated from the info on the standard drives and on the parity one. Another advantage of RAID-Z is the fact that even if a disk drive stops working, the system could switch to a different one right away without service disturbances of any kind. RAID-Z adds one more level of safety for the content that you upload on our cloud Internet hosting platform in addition to the ZFS file system which uses unique checksums so as to validate the integrity of each and every file.
RAID in VPS Hosting
If you take advantage of one of our virtual private server solutions, any content that you upload will be kept on SSD drives which work in RAID. At least 1 drive is intended for parity so as to guarantee the integrity of your data. In simple terms, this is a special drive where info is copied with one bit added to it. If a disk inside the RAID stops functioning, your Internet sites will continue working and when a new disk replaces the malfunctioning one, the bits of the info that will be copied on it are calculated using the healthy and the parity drives. That way, any chance of corrupting data throughout the process is avoided. We also employ conventional hard drives which work in RAID for storing backups, so should you include this service to your VPS package, your site content will be kept on multiple drives and you won't ever have to worry about its integrity even in the event of multiple drive failures.