RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which enables a system to use a number of hard drives as one single logical unit. Simply put, all of the drives are used as one and the information on all of them is the same. Such a setup has two major advantages over using just a single drive to store data - the first is redundancy, so in the event that one drive fails, the data will be accessed through the others, and the second one is improved performance because the input/output, or reading/writing operations will be distributed among multiple drives. There are different RAID types depending on what number of drives are employed, if reading and writing are both done from all the drives at the same time, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, etcetera. Depending on the exact setup, the fault tolerance and the performance may differ.
RAID in Cloud Website Hosting
Any content which you upload to your new cloud website hosting account will be stored on fast SSD drives that operate in RAID-Z. This configuration is built to employ the ZFS file system that runs on our cloud web hosting platform and it adds another level of security for your site content in addition to the real-time checksum validation 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 info is written on it, an extra 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 disks and on the parity one. With RAID-Z, the functioning of our system will never be interrupted and it'll continue operating efficiently until the faulty drive is replaced and the info is synchronized on it.
RAID in Semi-dedicated Hosting
The RAID type that we use for the cloud Internet hosting platform where your semi-dedicated hosting account will be created is called RAID-Z. What is different about it is that at least one of the disks is used as a parity drive. Simply put, whenever any data is duplicated on this specific hard drive, one more bit is included to it and in the event that a malfunctioning disk is changed, the data that will be cloned on it is a mix of the data on the remaining disk drives in the RAID and that on the parity one. It's done this way to guarantee that your data is intact. Throughout this process, your sites will be up and running normally since RAID-Z allows for an entire drive to fail without service disturbances and it simply uses one of the remaining ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to guarantee that no data will get silently corrupted on our servers, you will not need to worry about the integrity of your files.
RAID in VPS Hosting
In case you take advantage of one of our virtual private server packages, any content that you upload will be stored on SSD drives which function in RAID. At least a single drive is used for parity so as to ensure the integrity of the info. In simple terms, this is a special drive where data is copied with one bit added to it. In the event that a disk from the RAID stops functioning, your websites will continue working and when a new disk takes the place of the flawed one, the bits of the info that will be duplicated on it are calculated using the healthy and the parity drives. By doing this, any chance of corrupting data throughout the process is prevented. We also employ ordinary hard drives which operate in RAID for storing backups, so should you add this service to your VPS package, your content will be saved on multiple drives and you'll never need to worry about its integrity even in the event of multiple drive breakdowns.