Redundant Array of Independent Disks, or RAID, is a way of storing content on a number of hard disk drives simultaneously. A RAID can be software or hardware depending on the hard drives that are used - physical or logical ones, yet what’s common between them is that they all operate as just a single unit where information is saved. The top advantage of using a RAID is redundancy as the info on all drives is exactly the same all of the time, so even if a drive fails for some reason, the data will still be available on the rest of the drives. The overall performance is enhanced as well because the reading and writing processes could be split between a number of drives, so a single one can't be overloaded. There are different sorts of RAIDs where the functionality and fault tolerance may differ based on the specific setup - whether your data is written on all the drives in real time or it is written on one drive and then mirrored on another, what amount of drives are used for the RAID, etc.

RAID in Hosting

The SSD drives which our cutting-edge cloud Internet hosting platform uses for storage function in RAID-Z. This sort of RAID is created to work with the ZFS file system which runs on the platform and it employs the so-called parity disk - a special drive where data saved on the other drives is cloned with an extra bit added to it. In case one of the disks fails, your Internet sites shall continue working from the other ones and once we replace the bad one, the info that will be copied on it will be recovered from what is stored on the rest of the drives together with the info from the parity disk. This is performed in order to be able to recalculate the bits of each and every file correctly and to verify the integrity of the info cloned on the new drive. This is another level of security for the content that you upload to your hosting account along with the ZFS file system which compares a special digital fingerprint for every single file on all disk drives in real time.

RAID in Semi-dedicated Servers

If you host your sites within a semi-dedicated server account from our company, all of the content that you upload will be kept on SSD drives which operate in RAID-Z. With this kind of RAID, at least 1 of the hard disks is employed for parity - when data is synced between the hard drives, an additional bit is added to it on the parity one. The purpose behind this is to ensure the integrity of the data which is duplicated to a brand new drive in the event that one of the drives in the RAID fails because the website content being copied on the brand new disk is recalculated from the info on the standard drives and on the parity one. Another advantage of RAID-Z is that even in case a hard drive stops functioning, the system can switch to another one right away without service interruptions of any type. RAID-Z adds an extra level of safety for the content which you upload on our cloud hosting platform along with the ZFS file system which uses unique checksums as a way to validate the integrity of each and every file.

RAID in VPS Servers

The SSD drives which we use on the physical machines where we create VPS servers function in RAID to ensure that any content that you upload will be available and intact at all times. At least one drive is used for parity - one bit of data is added to any data copied on it. In the event that a main drive stops working, it is changed and the information that will be copied on it is calculated between the other drives and the parity one. It's done this way to make sure that the required data is copied and that no file is corrupted as the new drive will be a part of the RAID afterwards. We also use hard drives functioning in RAID on the backup servers, so in the event that you add this upgrade to your VPS plan, you'll use an even more reliable Internet hosting service as your content will be available on multiple drives irrespective of any kind of unexpected hardware malfunction.