RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which makes it possible for a system to use multiple hard drives as one single logical unit. Simply put, all the drives are used as one and the data on all of them is identical. Such a setup has two major advantages over using just a single drive to store data - the first is redundancy, so in the event that one drive stops working, the data will be accessible through the remaining ones, and the second one is better performance as the input/output, or reading/writing operations will be spread among multiple drives. You can find different RAID types in accordance with what amount of drives are employed, whether reading and writing are both executed from all of the 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, and so on. Determined by the exact setup, the error tolerance and the performance may differ.

RAID in Website Hosting

All the content that you upload to your new website hosting account will be stored on fast SSD drives that function 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 site content on top of the real-time checksum verification that ZFS uses to ensure the integrity of the data. With RAID-Z, the data is saved on a couple of disks and at least one of them is a parity disk - whenever data is recorded on it, an additional bit is added, so in the event that any drive fails for some reason, the stability of the data can be verified by recalculating its bits in accordance with what is saved on the production hard drives and on the parity one. With RAID-Z, the functioning of our system won't be interrupted and it'll continue working effectively until the problematic drive is changed and the info is synced on it.

RAID in Semi-dedicated Hosting

The information uploaded to any semi-dedicated hosting account is stored on SSD drives that function in RAID-Z. One of the drives in type of a setup is used for parity - every time data is copied on it, an extra bit is added. If a disk happens to be flawed, it will be taken out of the RAID without disturbing the functioning of the sites as the data will load from the rest of the drives, and when a brand new drive is added, the info that will be copied on it will be a blend between the info on the parity disk and data stored on the other drives in the RAID. That is done to ensure that the info that is being duplicated is accurate, so once the new drive is rebuilt, it can be included in the RAID as a production one. This is an extra guarantee for the integrity of your data as the ZFS file system which runs on our cloud hosting platform compares a special checksum of all of the copies of your files on the various drives in order to avoid any chance of silent data corruption.

RAID in VPS Hosting

The SSD drives that we use on the physical machines where we set up virtual private servers work in RAID to ensure that any content that you upload will be available and intact at all times. At least a single drive is used for parity - one bit of data is added to any data copied on it. In case a main drive breaks down, it is replaced and the information that will be cloned on it is calculated between the other drives and the parity one. This is done to make sure that the needed info is copied and that not a single file is corrupted as the new drive will be included in the RAID afterwards. Also, we use hard disk drives functioning in RAID on the backup servers, so in case you add this upgrade to your VPS package, you'll use an even more reliable Internet hosting service as your content will be available on multiple drives irrespective of any sudden hardware malfunction.