RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that enables a system to employ multiple hard drives as one single logical unit. Simply put, all the drives are used as one and the info on all of them is identical. Such a setup has 2 huge advantages over using a single drive to keep data - the first is redundancy, so in the event that one drive doesn't work, the information will be accessible through the remaining ones, and the second one is improved performance as the input/output, or reading/writing operations will be spread among several drives. There're different RAID types based on what amount of drives are employed, whether reading and writing are both done from all drives concurrently, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. According to the particular setup, the error tolerance and the performance could differ.

RAID in Cloud Web Hosting

The SSD drives that our cutting-edge cloud hosting platform employs for storage operate in RAID-Z. This type of RAID is developed to work with the ZFS file system which runs on the platform and it works by using the so-called parity disk - a special drive where info kept on the other drives is duplicated with an extra bit added to it. In case one of the disks stops working, your sites shall continue working from the other ones and once we replace the malfunctioning one, the data which will be duplicated on it will be recovered from what is stored on the other drives as well as the info from the parity disk. This is performed so as to be able to recalculate the bits of every file adequately and to validate the integrity of the data copied on the new drive. This is an additional level of security for the info which you upload to your cloud web hosting account along with the ZFS file system which compares a special digital fingerprint for each and every file on all the drives in real time.

RAID in Semi-dedicated Hosting

The RAID type that we use for the cloud web hosting platform where your semi-dedicated hosting account will be created is known as RAID-Z. What's different about it is that at least one of the disks is used as a parity drive. Put simply, whenever any kind of data is duplicated on this special disk drive, one more bit is included to it and in the event that a problematic disk is replaced, the data that will be copied on it is a mix of the data on the other drives in the RAID and that on the parity one. It's done this way to make sure that the data is intact. Throughout this process, your sites will be working normally as RAID-Z enables an entire drive to fail without any service disturbances and it simply works by using one of the remaining ones as the main production drive. Using 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 Hosting

The SSD drives which we use on the physical machines where we generate virtual private servers work in RAID to ensure that any content you upload will be available and intact all of the time. At least 1 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 replaced and the information which will be cloned on it is calculated between the rest of the drives and the parity one. This is done to make sure that the correct information is copied and that not a single file is corrupted as the new drive will be a part of the RAID afterwards. In addition, we use hard disk drives functioning in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you will use an even more reliable Internet hosting service since your content will be available on multiple drives irrespective of any sort of unexpected hardware failure.