RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that permits a system to employ multiple hard drives as a single logical unit. To put it differently, all of the drives are used as one and the information on all of them is identical. This type of a setup has two huge advantages over using a single drive to save data - the first one is redundancy, so in case one drive stops working, the data will be accessible from the remaining ones, and the second is improved performance since the input/output, or reading/writing operations will be spread among a number of drives. You can find different RAID types in accordance with how many drives are used, if reading and writing are both handled from all the drives simultaneously, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, etc. Determined by the particular setup, the fault tolerance and the performance may differ.
RAID in Cloud Web Hosting
Any content which you upload to your new cloud web hosting account will be placed on quick SSD drives which operate in RAID-Z. This configuration is built to work with the ZFS file system that runs on our cloud Internet hosting platform and it adds another level of protection for your website content in addition to the real-time checksum validation that ZFS uses to guarantee the integrity of the data. With RAID-Z, the info is stored on a couple of disks and at least one is a parity disk - whenever data is recorded on it, an additional bit is added, so if any drive fails for some reason, the integrity of the info can be verified by recalculating its bits based on what is saved on the production hard disks and on the parity one. With RAID-Z, the functioning of our system will never be interrupted and it'll continue working efficiently until the malfunctioning drive is replaced and the data is synced on it.
RAID in Semi-dedicated Hosting
If you host your Internet sites in a semi-dedicated hosting account from our firm, all the content which you upload will be held on SSD drives that work in RAID-Z. With this kind of RAID, at least 1 of the hard drives is employed for parity - when data is synced between the disks, an additional bit is added to it on the parity one. The reasoning behind this is to ensure the integrity of the info that is duplicated to a brand new drive in the event that one of the drives in the RAID stops working as the site content being copied on the new disk is recalculated from the info on the standard drives and on the parity one. An additional advantage of RAID-Z is the fact that even in case a drive stops functioning, the system could switch to another one immediately without service disruptions of any sort. RAID-Z adds one more level of protection for the content which you upload on our cloud hosting platform in addition to the ZFS file system that uses unique checksums in order to verify the integrity of each and every file.
RAID in VPS Web Hosting
The physical servers where we create virtual private server employ fast SSD drives which will raise the speed of your sites considerably. The hard disks operate in RAID to ensure that you won't lose any information as a result of a power loss or a hardware breakdown. The production servers work with a variety of drives where the data is kept and one disk is used for parity i.e. one bit is added to all the info copied on it, that makes it easier to recover the website content without any loss in case a main drive fails. In case you use our backup service, your information will be stored on an individual machine that 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 make sure that we will have a backup of your site content all the time. With this particular setup your info will always be safe because it will be available on a lot of disk drives.