Redundant Array of Independent Disks, or RAID, is a method of saving content on several hard disks simultaneously. A RAID might be software or hardware based on the drives which are used - physical or logical ones, however what is common between them is that they all work as just a single unit where data is saved. The top advantage of using a RAID is redundancy because the information on all of the drives is the same all the time, so even in case some drive fails for whatever reason, the info will still be available on the remaining drives. The overall performance will also improve since the reading and writing processes could be split between multiple drives, so a single one will not be overloaded. There're different kinds of RAIDs where the effectiveness and fault tolerance could differ based on the particular setup - whether information is written on all the drives in real time or it's written on a single drive and after that mirrored on another, the number of drives are used for the RAID, and many others.
RAID in Cloud Website Hosting
The SSD drives that our cutting-edge cloud web hosting platform employs for storage work in RAID-Z. This sort of RAID is created to work with the ZFS file system which runs on the platform and it takes advantage of the so-called parity disk - a special drive where information kept on the other drives is duplicated with an extra bit added to it. In case one of the disks fails, your sites shall continue working from the other ones and as soon as we replace the problematic one, the data which will be copied on it will be recovered from what is stored on the other drives as well as the data from the parity disk. This is done in order to be able to recalculate the elements of each and every file adequately and to confirm the integrity of the data cloned on the new drive. This is an additional level of security for the info that you upload to your cloud website hosting account together with the ZFS file system that compares a unique digital fingerprint for each file on all hard drives in real time.
RAID in Semi-dedicated Servers
If you host your Internet sites inside a semi-dedicated server account from our company, all of the content which you upload will be stored on SSD drives which operate in RAID-Z. With this kind of RAID, at least one of the drives is used for parity - when data is synced between the drives, an extra bit is added to it on the parity one. The reasoning behind this is to guarantee the integrity of the data that is cloned to a brand new drive in case one of the drives in the RAID breaks down since the website content being copied on the brand new disk is recalculated from the information on the standard hard drives and on the parity one. An additional advantage of RAID-Z is the fact that even in the event that a hard drive fails, the system could switch to a different one instantly without service disruptions of any type. RAID-Z adds an additional level of security for the content you upload on our cloud web hosting platform along with the ZFS file system which uses unique checksums so as to verify the integrity of every single file.
RAID in VPS Servers
In case you take advantage of one of our VPS server plans, any content you upload will be saved on SSD drives which work in RAID. At least a single drive is intended for parity so as to guarantee the integrity of the data. In simple terms, this is a special drive where info is copied with one bit added to it. In the event that a disk in the RAID fails, your Internet sites will continue working and when a new disk substitutes the defective one, the bits of the information that will be copied on it are calculated by using the healthy and the parity drives. That way, any potential for corrupting data throughout the process is averted. We also employ standard hard disks which work in RAID for storing backup copies, so if you include this service to your VPS package, your website content will be saved on multiple drives and you'll never have to worry about its integrity even in the event of multiple drive breakdowns.