RAID, or Redundant Array of Independent Disks, is a technology for storing data on a number hard drives which work together as one single logical unit. The drives could be physical or logical i.e. in the second case one drive is divided into individual ones through virtualization software. In any case, the very same info is stored on all of the drives and the basic benefit of employing such a setup is that if a drive breaks down, the data shall still be available on the remaining ones. Employing a RAID also boosts the overall performance as the input and output operations will be spread among a few drives. There are several types of RAID dependant upon how many drives are used, whether writing is carried out on all drives in real time or just on a single one, and how the info is synchronized between the drives - whether it's recorded in blocks on one drive after another or it is mirrored from one on the others. These factors indicate that the fault tolerance as well as the performance between the various RAID types can differ.

RAID in Hosting

The SSD drives which our cutting-edge cloud hosting platform uses for storage work in RAID-Z. This type of RAID is developed to work with the ZFS file system that runs on the platform and it employs the so-called parity disk - a specific drive where info saved on the other drives is copied with an extra bit added to it. If one of the disks fails, your Internet sites will continue working from the other ones and as soon as we replace the bad one, the information that will be duplicated on it will be recovered from what is stored on the remaining drives as well as the information from the parity disk. This is done so as to be able to recalculate the bits of every file adequately and to confirm the integrity of the data copied on the new drive. This is one more level of security for the content that you upload to your hosting account along with the ZFS file system that analyzes a unique digital fingerprint for each and every file on all of the drives in real time.

RAID in Semi-dedicated Hosting

The info uploaded to any semi-dedicated hosting account is kept on SSD drives that function in RAID-Z. One of the drives in type of a configuration is used for parity - any time data is copied on it, an extra bit is added. In case a disk turns out to be defective, it will be taken out of the RAID without interrupting the work of the websites since the data will load from the remaining drives, and when a new drive is included, the info which will be duplicated on it will be a mix between the information on the parity disk and data stored on the other drives in the RAID. This is done to ensure that the information which is being cloned is correct, so once the new drive is rebuilt, it could be incorporated into the RAID as a production one. This is one more guarantee for the integrity of your info 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 to avoid any possibility of silent data corruption.

RAID in VPS Hosting

The SSD drives which we use on the machines where we generate virtual private servers function in RAID to ensure that any content you upload will be available and intact all of the time. At least a single drive is employed for parity - one bit of data is added to any data cloned on it. If a main drive stops working, it is changed and the information which will be duplicated on it is calculated between the rest of the drives and the parity one. It's done this way to make sure that the right 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 case you add this upgrade to your VPS package, you shall use an even more reliable web hosting service since your content will be available on multiple drives regardless of any unexpected hardware failure.