RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that enables a system to use many hard drives as a single logical unit. Simply put, all of the drives are used as one and the data on all of them is identical. Such a setup has two key advantages over using just a single drive to save data - the first is redundancy, so if one drive doesn't work, the data will be accessed from the others, and the second one is improved performance because the input/output, or reading/writing operations will be spread among a number of drives. There're different RAID types depending on how many drives are employed, whether reading and writing are both handled from all of the drives simultaneously, 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 vary.

RAID in Website Hosting

The disk drives that we employ for storage with our state-of-the-art cloud web hosting platform are not the standard HDDs, but extremely fast solid-state drives (SSD). They function in RAID-Z - a special setup developed for the ZFS file system which we employ. Any content that you upload to your website hosting account will be held on multiple hard disks and at least 1 shall be employed as a parity disk. This is a specific drive where an additional bit is included to any content copied on it. In case a disk in the RAID stops functioning, it will be changed with no service interruptions and the info will be rebuilt on the new drive by recalculating its bits thanks to the data on the parity disk plus that on the remaining disks. This is done in order 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 will never have to be concerned about losing any information no matter what.

RAID in Semi-dedicated Servers

The RAID type which we use for the cloud web hosting platform where your semi-dedicated server account will be created is called RAID-Z. What is different about it is that at least one of the disks is used as a parity drive. Simply put, whenever any kind of data is cloned on this special drive, one more bit is included to it and in the event that a defective disk is replaced, the data which will be copied on it is a combination of the data on the remaining hard drives in the RAID and that on the parity one. This is done to ensure that the data is intact. Throughout this process, your websites will be functioning normally as RAID-Z makes it possible for an entire drive to fail without causing any service disruptions and it simply uses one of the remaining ones as the main production drive. Employing RAID-Z together with the ZFS file system that uses checksums to guarantee that no data can get silently corrupted on our servers, you'll never have to worry about the integrity of your files.

RAID in VPS Servers

If you employ one of our VPS server packages, any content you upload will be stored on SSD drives that work in RAID. At least one drive is used for parity to guarantee the integrity of your data. In simple terms, this is a special drive where data is copied with one bit added to it. In case a disk in the RAID fails, your websites will continue working and when a new disk substitutes the malfunctioning one, the bits of the data that will be cloned on it are calculated using the healthy and the parity drives. That way, any possibility of corrupting data during the process is prevented. We also employ standard hard disks that function in RAID for storing backups, so if you include this service to your VPS package, your content will be saved on multiple drives and you will never need to worry about its integrity even in the event of multiple drive breakdowns.