Redundant Array of Independent Disks, or RAID, is a method of storing content on several hard drives concurrently. A RAID can be software or hardware depending on the HDDs which are used - physical or logical ones, still what is common between them is the fact that they all operate as one single unit where info is saved. The biggest advantage of using a RAID is redundancy because the info on all drives will be exactly the same at all times, so even if one of the drives fails for whatever reason, the data will still be present on the remaining drives. The general performance is enhanced as well as the reading and writing processes could be split between various drives, so a single one will not be overloaded. There're different kinds of RAIDs where the capabilities and fault tolerance may differ based on the particular setup - whether info is written on all of the drives in real time or it's written on a single drive and after that mirrored on another, what amount of drives are used for the RAID, and so on.
RAID in Cloud Web Hosting
The SSD drives that our cutting-edge cloud web hosting platform uses 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 works by using the so-called parity disk - a special drive where data kept on the other drives is duplicated with an extra bit added to it. If one of the disks stops working, your sites will continue working from the other ones and once we replace the problematic one, the information that will be copied on it will be recovered from what is stored on the rest of the drives together with the data from the parity disk. This is done in order to be able to recalculate the bits of each file properly and to confirm the integrity of the info cloned on the new drive. This is an additional level of security for the info you upload to your cloud web hosting account in addition to the ZFS file system that analyzes a special digital fingerprint for each file on all of the disk drives in real time.
RAID in Semi-dedicated Hosting
In case you host your sites within a semi-dedicated hosting account from our firm, any content which you upload will be held on SSD drives that work in RAID-Z. With this form of RAID, at least one of the drives is used for parity - when data is synced between the hard drives, an extra bit is added to it on the parity one. The purpose behind this is to ensure the integrity of the information which is cloned to a new drive if one of the hard drives in the RAID fails as the content being copied on the new disk is recalculated from the data on the standard drives and on the parity one. Another advantage of RAID-Z is that even if a drive fails, the system can switch to another one instantly without service disturbances of any sort. RAID-Z adds one more level of safety for the content that you upload on our cloud web hosting platform in addition to the ZFS file system that uses unique checksums as a way to authenticate the integrity of every single file.
RAID in VPS Web Hosting
The physical servers where we make virtual private server work with quick SSD drives that will boost the speed of your sites substantially. The hard drives function in RAID to guarantee that you will not lose any information because of a power loss or a hardware failure. The production servers employ multiple drives where the data is kept and one disk is used for parity i.e. one bit is added to all the data copied on it, which makes it easier to recover the site content without loss in the event a main drive breaks down. In case you use our backup service, the info will be kept on an independent machine that uses standard hard-disk drives and although there's no parity one in this case, they are also in a RAID to ensure that we will have a backup copy of your site content all the time. With this type of configuration your data will always be safe as it will be available on several disk drives.