RAID, or Redundant Array of Independent Disks, is a technology for storing data on multiple hard disks that work together as one single logical unit. The drives can be physical or logical i.e. in the aforementioned case a single drive is split into different ones via virtualization software. Either way, the very same data is kept on all the drives and the basic advantage of using this kind of a setup is that in the event that a drive fails, the data will still be available on the remaining ones. Using a RAID also boosts the performance because the input and output operations will be spread among several drives. There are several types of RAID dependant upon how many hard drives are used, whether writing is performed on all the drives in real time or just on one, and how the data 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. All of these factors suggest that the fault tolerance and the performance between the different RAID types may vary.

RAID in Web Hosting

The hard drives which we use for storage with our top-notch cloud web hosting platform are not the standard HDDs, but super fast solid-state drives (SSD). They function in RAID-Z - a special setup developed for the ZFS file system which we work with. All of the content that you upload to the web hosting account will be saved on multiple hard disks and at least one of them shall be employed as a parity disk. This is a special drive where a further bit is added to any content copied on it. If a disk in the RAID fails, it'll be changed with no service interruptions and the info will be rebuilt on the new drive by recalculating its bits using the data on the parity disk plus that on the remaining disks. This is done to ensure the integrity of the info and along with the real-time checksum authentication which the ZFS file system executes on all drives, you will never need to concern yourself with losing any information no matter what.

RAID in Semi-dedicated Hosting

The information uploaded to any semi-dedicated hosting account is kept on SSD drives that function in RAID-Z. One of the drives in this kind of a setup is used for parity - every time data is copied on it, an extra bit is added. In case a disk happens to be defective, it will be removed from the RAID without disturbing the operation of the websites because the data will load from the rest of the drives, and when a brand new drive is added, the data that will be duplicated on it will be a combination between the data on the parity disk and data stored on the other hard drives in the RAID. That is done so as to ensure that the info which is being duplicated is correct, so once the new drive is rebuilt, it could be integrated into the RAID as a production one. This is an additional guarantee for the integrity of your information as the ZFS file system that runs on our cloud Internet hosting platform analyzes a special checksum of all the copies of your files on the various drives so as to avoid any chance of silent data corruption.

RAID in VPS Web Hosting

If you employ one of our virtual private server solutions, any content that you upload will be kept on SSD drives which function in RAID. At least one drive is employed for parity to ensure the integrity of your data. In simple terms, this is a special drive where information is copied with one bit added to it. In the event that a disk within the RAID fails, your sites will continue working and when a new disk substitutes the faulty one, the bits of the information that will be copied on it are calculated using the healthy and the parity drives. By doing this, any possibility of corrupting data during the process is averted. We also use standard hard disks which operate in RAID for storing backups, so should you add this service to your VPS package, your site content will be kept on multiple drives and you'll never need to worry about its integrity even in the event of multiple drive failures.