RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which allows a system to use a number of hard drives as one single logical unit. To put it differently, all the drives are used as one and the data on all of them is identical. This kind of a configuration has 2 major advantages over using a single drive to keep data - the first one is redundancy, so if one drive fails, the information will be accessed through the others, and the second one is better performance as the input/output, or reading/writing operations will be distributed among several drives. There're different RAID types depending on how many drives are used, whether reading and writing are both done from all drives simultaneously, whether 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 Web Hosting
All content that you upload to your new web hosting account will be stored on quick SSD drives that operate in RAID-Z. This setup is built to work with the ZFS file system which runs on our cloud web hosting platform and it adds one more level of protection for your content in addition to the real-time checksum verification which ZFS uses to ensure the integrity of the data. With RAID-Z, the info is saved on a number of disks and at least 1 is a parity disk - whenever data is written on it, an extra bit is added, so in the event that any drive stops working for whatever reason, the integrity of the information can be verified by recalculating its bits based on what is stored on the production disks and on the parity one. With RAID-Z, the operation of our system will never be interrupted and it will continue functioning efficiently until the problematic drive is replaced and the information is synced on it.
RAID in Semi-dedicated Hosting
The RAID type that we use for the cloud hosting platform where your semi-dedicated hosting account shall be created is referred to as RAID-Z. What is different about it is that at least one of the disks is employed as a parity drive. Simply put, whenever any data is duplicated on this particular hard drive, one more bit is included to it and in the event that a problematic disk is changed, the information that will be duplicated on it is a mix of the data on the other hard drives in the RAID and that on the parity one. It's done this way to guarantee that your data is intact. During this process, your sites will be working normally as RAID-Z makes it possible for a whole drive to fail without any service disruptions and it simply uses one of the other ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to ensure that no data can get silently corrupted on our servers, you'll never have to worry about the integrity of your files.
RAID in VPS Hosting
All virtual private server accounts which we offer are created on physical servers which take advantage of SSD drives working in RAID. At least one drive is intended for parity - one extra bit is included in the information duplicated on it and in case a main disk fails, this bit makes it easier to recalculate the bits of the files on the failed disk drive so that the correct data is recovered on the new drive included in the RAID. In the mean time, your websites will still be online since all the info will still load from at least one other drive. In the event that you add routine backups to your VPS package, a copy of your info will be kept on standard disk drives that also work in RAID since we want to make sure that any sort of content you upload will be risk-free all of the time. Working with multiple drives in RAID for all main and backup servers permits us to offer fast and reliable web hosting service.