Redundant Array of Independent Disks, or RAID, is a method of keeping content on several hard disks simultaneously. A RAID could be software or hardware depending on the HDDs which are used - physical or logical ones, still what’s common between them is that they all operate as just a single unit where data is saved. The top advantage of employing a RAID is redundancy because the information on all of the drives shall be the same all of the time, so even in the event that a drive fails for whatever reason, the information will still be available on the rest of the drives. The overall performance is also enhanced as the reading and writing processes will be split between different drives, so a single one can't be overloaded. There're different sorts of RAIDs where the functionality and fault tolerance may differ according to the particular setup - whether your data is written on all drives in real time or it is written on a single drive and afterwards mirrored on another, what amount of drives are used for the RAID, and so on.

RAID in Hosting

The drives which we employ for storage with our revolutionary cloud web hosting platform are not the classic HDDs, but fast solid-state drives (SSD). They work in RAID-Z - a special setup designed for the ZFS file system that we work with. All the content that you add to your hosting account will be saved on multiple drives and at least 1 shall be employed as a parity disk. This is a specific drive where a further bit is included to any content copied on it. In case a disk in the RAID fails, it'll be changed with no service interruptions and the information will be rebuilt on the new drive by recalculating its bits thanks to the data on the parity disk plus that on the remaining disks. This is done in order to ensure the integrity of the information and together with the real-time checksum authentication which the ZFS file system executes on all drives, you won't ever have to concern yourself with the loss of any data no matter what.

RAID in Semi-dedicated Hosting

If you host your websites inside a semi-dedicated hosting account from our firm, all the content that you upload will be kept on SSD drives that work in RAID-Z. With this kind of RAID, at least 1 of the drives is used for parity - when data is synchronized between the drives, an additional bit is added to it on the parity one. The idea behind this is to guarantee the integrity of the information which is duplicated to a new drive in case one of the disks in the RAID stops working since the website content being copied on the brand new disk is recalculated from the data on the standard drives and on the parity one. Another advantage of RAID-Z is the fact that even in the event that a hard drive stops working, the system can switch to a different one instantly without service interruptions of any sort. RAID-Z adds one more level of protection for the content you upload on our cloud Internet hosting platform together with the ZFS file system that uses unique checksums as a way to validate the integrity of each file.

RAID in VPS

The SSD drives which we use on the machines where we create virtual private servers work in RAID to ensure that any content you upload will be available and intact all the time. At least one drive is employed for parity - one bit of information is added to any data copied on it. In the event that a main drive breaks down, it is replaced and the data which will be cloned on it is calculated between the other drives and the parity one. It's done this way to ensure that the required data is copied and that not a single file is corrupted as the new drive will be used in the RAID afterwards. We also use hard drives working in RAID on the backup servers, so in the event that you add this upgrade to your VPS plan, you shall use an even more reliable web hosting service because your content will be available on multiple drives irrespective of any sort of unforeseen hardware failure.