RAID, or Redundant Array of Independent Disks, is a technology of saving data on several hard drives which work together as one single logical unit. The drives can be physical or logical i.e. in the aforementioned case a single drive is divided into different ones via virtualization software. In any case, the same info is saved on all of the drives and the key advantage of using such a setup is that if a drive fails, the data will still be available on the remaining ones. Using a RAID also enhances the performance since the input and output operations will be spread among a few drives. There are several kinds of RAID dependant upon how many hard drives are used, whether writing is done on all of the drives in real time or just on one, and how the data is synchronized between the hard 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 imply that the error tolerance as well as the performance between the various RAID types can differ.

RAID in Hosting

The hard disks which we use for storage with our innovative cloud web hosting platform are not the traditional HDDs, but quick solid-state drives (SSD). They operate in RAID-Z - a special setup intended for the ZFS file system that we employ. All the content that you add to your hosting account will be kept on multiple hard disks and at least one of them will be employed as a parity disk. This is a special drive where an extra bit is added to any content copied on it. If a disk in the RAID stops functioning, it'll be changed without any service disruptions and the information will be recovered on the new drive by recalculating its bits using the data on the parity disk along with that on the remaining disks. This is done so as to ensure the integrity of the data and along with the real-time checksum verification which the ZFS file system performs on all drives, you'll never need to worry about losing any data no matter what.

RAID in Semi-dedicated Hosting

The info uploaded to any semi-dedicated hosting account is saved on SSD drives that work in RAID-Z. One of the drives in this kind of a setup is used for parity - whenever data is copied on it, an extra bit is added. In case a disk turns out to be defective, it will be removed from the RAID without interrupting the operation of the sites since the data will load from the rest of the drives, and when a brand new drive is added, the info which will be copied on it will be a combination between the data on the parity disk and data stored on the other hard disks in the RAID. This is done to guarantee that the data which is being copied is accurate, so once the new drive is rebuilt, it can be incorporated into the RAID as a production one. This is an additional warranty for the integrity of your info because the ZFS file system which runs on our cloud hosting platform analyzes a special checksum of all copies of your files on the various drives in order to avoid any possibility of silent data corruption.

RAID in VPS Web Hosting

If you use one of our virtual private server plans, any content you upload will be stored on SSD drives that operate in RAID. At least one drive is employed for parity to guarantee the integrity of the information. In simple terms, this is a special drive where data is copied with one bit added to it. In the event that a disk inside the RAID stops working, your Internet sites will continue working and when a new disk replaces the defective one, the bits of the information that will be duplicated on it are calculated by using the healthy and the parity drives. That way, any probability of corrupting data during the process is prevented. We also employ conventional hard drives that function in RAID for storing backups, so in case you include this service to your VPS package, your site content will be stored on multiple drives and you'll never need to worry about its integrity even in the event of multiple drive breakdowns.