RAID, which is an acronym of Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that enables a system to employ a number of hard drives as one single logical unit. In other words, all the drives are used as one and the info on all of them is identical. This kind of a configuration has two major advantages over using just a single drive to keep data - the first one is redundancy, so in the event that one drive stops working, the data will be accessed through the others, and the second is improved performance as the input/output, or reading/writing operations will be spread among different drives. There are different RAID types depending on the number of drives are used, if reading and writing are both performed from all 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, etcetera. According to the particular setup, the error tolerance and the performance may differ.

RAID in Shared Website Hosting

The hard disks that we employ for storage with our top-notch cloud web hosting platform are not the classic HDDs, but extremely fast solid-state drives (SSD). They operate in RAID-Z - a special setup intended for the ZFS file system that we use. Any content that you add to the shared website 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 a further bit is included to any content copied on it. If a disk in the RAID fails, it will be replaced without any service disturbances 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 other disks. This is done to guarantee the integrity of the information and along with the real-time checksum authentication which the ZFS file system runs on all drives, you'll never need to worry about the loss of any info no matter what.

RAID in Semi-dedicated Servers

The RAID type that we employ for the cloud Internet hosting platform where your semi-dedicated server account will be created is called RAID-Z. What's different about it is that at least one of the disks is used as a parity drive. In simple terms, whenever any kind of data is copied on this particular drive, one more bit is added to it and if a faulty disk is replaced, the info which will be copied on it is a mix of the data on the remaining hard drives in the RAID and that on the parity one. This is done to make sure that your information is intact. During this process, your sites will be functioning normally because RAID-Z enables a whole drive to fail without service interruptions and it simply works by using one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to guarantee that no data shall get silently corrupted on our servers, you won't ever need to worry about the integrity of your files.

RAID in VPS Servers

If you take advantage of one of our VPS server plans, any content you upload will be kept on SSD drives that work in RAID. At least a single drive is intended for parity to ensure the integrity of the info. In simple terms, this is a special drive where information is copied with one bit added to it. If a disk part of the RAID fails, your sites will continue working and when a new disk substitutes the defective one, the bits of the information that will be cloned on it are calculated by using the healthy and the parity drives. By doing this, any chance of corrupting data during the process is prevented. We also use ordinary hard drives which operate in RAID for storing backup copies, so in case you include this service to your VPS package, your website content will be saved on multiple drives and you won't ever need to worry about its integrity even in the event of multiple drive breakdowns.