Redundant Array of Independent Disks, or RAID, is a method of saving content on several hard disks 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 just one single unit where info is saved. The main advantage of employing a RAID is redundancy as the info on all of the drives is the same at all times, so even in case one of the drives fails for whatever reason, the data will still be available on the rest of the drives. The overall performance is also enhanced because the reading and writing processes will be split between various drives, so a single one will not be overloaded. There are different types of RAIDs where the functionality and fault tolerance may differ depending on the particular setup - whether data is written on all of the drives real-time or it is written on a single drive and then mirrored on another, what number of drives are used for the RAID, and so on.

RAID in Cloud Hosting

All the content that you upload to your new cloud hosting account will be saved on fast SSD drives that operate in RAID-Z. This configuration is built to use the ZFS file system which runs on our cloud Internet hosting platform and it adds one more level of security for your site content in addition to the real-time checksum authentication that ZFS uses to guarantee the integrity of the data. With RAID-Z, the data is stored on several disks and at least 1 is a parity disk - whenever data is written on it, an additional bit is added, so in case any drive stops functioning for whatever reason, the integrity of the info can be verified by recalculating its bits in accordance with what is kept on the production drives and on the parity one. With RAID-Z, the functioning of our system won't be interrupted and it will continue functioning effectively until the problematic drive is replaced and the data is synced on it.

RAID in Semi-dedicated Hosting

The SSD drives that are used for holding any content uploaded to the semi-dedicated hosting accounts that we offer work in RAID-Z. This is a specific configuration where one or more drives are used for parity i.e. the system will add an extra bit to any data copied on such a drive. In case that a disk fails and is substituted with a new one, what data will be duplicated on the latter will be a mix calculated between the data on the remaining disks and that on the parity one. This is done to guarantee that the information on the new drive will be accurate. During the procedure, the RAID will continue functioning normally and the problematic drive will not affect the adequate operation of your Internet sites in any way. Working with SSDs in RAID-Z is a superb addition to the ZFS file system that runs on our advanced cloud platform with respect to preserving the integrity of your files as ZFS uses unique digital identifiers referred to as checksums so as to avoid silent data corruption.


The SSD drives that we use on the physical machines where we set up virtual private servers operate in RAID to ensure that any content you upload will be available and intact all of the time. At least one drive is used for parity - one bit of information is added to any data copied on it. In case a main drive stops working, it is changed and the information which will be duplicated on it is calculated between the other drives and the parity one. This is done to make sure that the correct data is copied and that no file is corrupted as the new drive will be incorporated into the RAID afterwards. We also use hard disks functioning in RAID on the backup servers, so if you add this upgrade to your VPS package, you will use an even more reliable hosting service as your content will be available on multiple drives irrespective of any unforeseen hardware malfunction.