RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that allows a system to use several hard drives as a single logical unit. To put it differently, all of the drives are used as one and the data on all of them is the same. Such a configuration has two key advantages over using just a single drive to store data - the first is redundancy, so in case one drive doesn't work, the information will be accessed through the others, and the second one is improved performance since the input/output, or reading/writing operations will be distributed among a number of drives. There are different RAID types based on the number of drives are employed, whether reading and writing are both done from all the drives concurrently, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and many others. Based on the exact setup, the error tolerance and the performance may vary.

RAID in Website Hosting

The drives which we employ for storage with our ground-breaking cloud web hosting platform are not the classic HDDs, but quick solid-state drives (SSD). They operate in RAID-Z - a special setup intended for the ZFS file system which we employ. Any content that you upload to your website hosting account will be kept on multiple hard drives and at least one will be used as a parity disk. This is a specific drive where a further bit is included to any content copied on it. If a disk in the RAID fails, it will be changed without service disruptions and the data will be recovered on the new drive by recalculating its bits using the data on the parity disk along with that on the other disks. This is done to ensure the integrity of the info and along with the real-time checksum validation which the ZFS file system runs on all drives, you'll never need to worry about losing any data no matter what.

RAID in Semi-dedicated Servers

The SSD drives that are used for saving any content uploaded to the semi-dedicated server accounts that we provide operate in RAID-Z. This is a special setup where one or more hard drives are used for parity i.e. the system will add an extra bit to any data copied on this type of a drive. If a disk fails and is substituted with a new one, what information will be copied on the latter will be a mix calculated between the data on the other disks and that on the parity one. This is done to make sure that the info on the new drive will be correct. Throughout the procedure, the RAID will continue working adequately and the malfunctioning drive won't affect the proper operation of your Internet sites at all. Using SSDs in RAID-Z is an amazing addition to the ZFS file system which runs on our top-notch cloud platform with respect to preserving the integrity of your files because ZFS uses special digital identifiers identified as checksums to avoid silent data corruption.

RAID in VPS Servers

The SSD drives that we use on the physical machines where we generate VPS servers operate in RAID to ensure that any content you upload will be available and intact all the time. At least a single drive is employed for parity - one bit of data is added to any data cloned on it. In the event that a main drive fails, it is replaced and the information that will be duplicated on it is calculated between the remaining drives and the parity one. This is done to ensure that the right information is copied and that not a single file is corrupted as the new drive will be a part of the RAID afterwards. Also, we use hard disks working in RAID on the backup servers, so in the event that you add this upgrade to your VPS plan, you will use an even more reliable web hosting service since your content will be available on multiple drives irrespective of any kind of sudden hardware malfunction.