RAID, which is an acronym of Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which permits a system to employ multiple hard drives as one single logical unit. To put it differently, all the drives are used as one and the info on all of them is identical. This kind of a setup has 2 key advantages over using a single drive to save data - the first is redundancy, so if one drive stops working, the data will be accessed from the others, and the second is better performance as the input/output, or reading/writing operations will be spread among a number of drives. You can find different RAID types depending on what number of drives are employed, if reading and writing are both done from all drives at the same time, if data is written in blocks on one drive after another or is mirrored between drives in the same time, etcetera. Depending on the particular setup, the fault tolerance and the performance may vary.

RAID in Cloud Hosting

All the content which you upload to your new cloud hosting account will be saved on quick SSD drives that operate in RAID-Z. This setup is built to employ the ZFS file system that runs on our cloud Internet hosting platform and it adds an additional level of security for your content on top of the real-time checksum authentication which ZFS uses to guarantee the integrity of the data. With RAID-Z, the information is stored on several disks and at least one of them is a parity disk - whenever data is recorded on it, an extra bit is added, so in the event that any drive stops functioning for whatever reason, the stability of the data can be verified by recalculating its bits based on what is saved on the production drives and on the parity one. With RAID-Z, the functioning of our system will not be interrupted and it'll continue operating smoothly until the faulty drive is replaced and the data is synchronized on it.

RAID in Semi-dedicated Servers

The SSD drives which are used for storing any website content uploaded to the semi-dedicated server accounts which we provide operate in RAID-Z. This is a specific setup where one or more drives are used for parity i.e. the system will include an additional bit to any data copied on such a disk drive. In case that a disk fails and is replaced with another one, what information will be duplicated on the latter shall be a mix calculated between the data on the remaining hard disks and that on the parity one. This is done to guarantee that the info on the new drive shall be accurate. During the procedure, the RAID will continue working normally and the malfunctioning drive will not have an effect on the normal operation of your websites by any means. Working with SSDs in RAID-Z is a great addition to the ZFS file system which runs on our top-notch cloud platform with regards to preserving the integrity of your files as ZFS uses unique digital identifiers referred to as checksums so as to avoid silent data corruption.

RAID in VPS Servers

The SSD drives which we use on the physical machines where we create VPS servers work in RAID to ensure that any content which you upload will be available and intact all of the time. At least 1 drive is used for parity - one bit of info is added to any data copied on it. In the event that a main drive fails, it is replaced and the information that will be cloned on it is calculated between the remaining 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 because the new drive will be a part of the RAID afterwards. In addition, we use hard drives working 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 regardless of any type of sudden hardware failure.