Redundant Array of Independent Disks, or RAID, is a way of keeping content on several hard drives simultaneously. A RAID can be software or hardware based on the HDDs which are used - physical or logical ones, but what is common between them is that they all work as one single unit where data is kept. The main advantage of using a RAID is redundancy because the info on all the drives is the same all the time, so even in case one of the drives fails for whatever reason, the info will still be present on the rest of the drives. The overall performance will also improve since the reading and writing processes can 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 exact setup - whether information is written on all of the drives real-time or it's written on one drive and then mirrored on another, what number of drives are used for the RAID, etcetera.

RAID in Shared Hosting

The SSD drives that our cutting-edge cloud Internet hosting platform employs for storage function in RAID-Z. This type of RAID is developed to work with the ZFS file system which runs on the platform and it uses the so-called parity disk - a special drive where information kept on the other drives is cloned with an extra bit added to it. In the event that one of the disks stops functioning, your sites will continue working from the other ones and after 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 information from the parity disk. This is performed so as to be able to recalculate the bits of every single file adequately and to verify the integrity of the information cloned on the new drive. This is an additional level of security for the info that you upload to your shared hosting account together with the ZFS file system which compares a unique digital fingerprint for each and every file on all of the drives in real time.

RAID in Semi-dedicated Servers

In case you host your Internet sites inside a semi-dedicated server account from our company, all the content you upload will be saved on SSD drives which operate in RAID-Z. With this kind of RAID, at least 1 of the disks is employed for parity - when data is synchronized between the drives, an extra bit is added to it on the parity one. The purpose behind this is to ensure the integrity of the info that is cloned to a new drive in case one of the drives in the RAID stops working since the site content being copied on the brand new disk is recalculated from the information on the standard drives and on the parity one. Another advantage of RAID-Z is the fact that even in the event that a drive stops functioning, the system could switch to a different one quickly without service disruptions of any kind. RAID-Z adds one more level of protection for the content you upload on our cloud Internet hosting platform in addition to the ZFS file system which uses unique checksums so as to verify the integrity of each and every file.

RAID in VPS Servers

In case you employ one of our VPS server solutions, any content which you upload will be saved on SSD drives which operate in RAID. At least one drive is employed for parity so as to ensure the integrity of the data. In simple terms, this is a special drive where information is copied with one bit added to it. In case a disk within the RAID fails, your Internet sites will continue working and when a new disk takes the place of the faulty one, the bits of the info that will be copied on it are calculated using the healthy and the parity drives. This way, any possibility of corrupting data during the process is avoided. We also employ standard hard disks which function in RAID for storing backup copies, so if you include this service to your VPS package, your website content will be stored on multiple drives and you will never have to worry about its integrity even in the event of multiple drive failures.