Redundant Array of Independent Disks, or RAID, is a method of saving content on several hard disk drives at the same time. A RAID might be software or hardware depending on the hard drives that are used - physical or logical ones, yet what’s common between them is the fact that they all operate as a single unit where info is saved. The top advantage of employing a RAID is redundancy because the data on all the drives shall be exactly the same at all times, so even in case a drive fails for whatever reason, the data will still be available on the other drives. The general performance will also improve because the reading and writing processes could be split between multiple drives, so a single one will not be overloaded. There're different sorts of RAIDs where the functionality and fault tolerance may vary according to the specific setup - whether info is written on all of the drives real-time or it's written on one drive and then mirrored on another, what number of drives are used for the RAID, and so on.

RAID in Website Hosting

The hard drives that we employ for storage with our state-of-the-art cloud Internet hosting platform are not the classic HDDs, but quick solid-state drives (SSD). They operate in RAID-Z - a special setup developed for the ZFS file system which we employ. All of the content that you add to your website hosting account will be saved on multiple disk drives and at least 1 shall be employed as a parity disk. This is a specific drive where a further bit is added to any content copied on it. If a disk in the RAID stops working, it will be changed without service interruptions and the info will be rebuilt on the new drive by recalculating its bits using the data on the parity disk plus that on the remaining disks. This is done to ensure the integrity of the information and along with the real-time checksum verification which the ZFS file system runs on all drives, you won't ever have to concern yourself with the loss of any info no matter what.

RAID in Semi-dedicated Servers

The SSD drives which are used for storing any content uploaded to the semi-dedicated server accounts that we provide operate in RAID-Z. This is a specific configuration where one or more drives are employed for parity i.e. the system will add an extra bit to any data duplicated on this kind of a hard drive. If a disk fails and is substituted with another one, what information will be copied on the latter shall be a combination calculated between the data on the other disks and that on the parity one. This is done to ensure that the information on the new drive shall be correct. Throughout the process, the RAID will continue working adequately and the problematic drive won't have an impact on the normal operation of your websites in any respect. Working with SSDs in RAID-Z is an impressive addition to the ZFS file system that runs on our cutting-edge cloud platform with respect to preserving the integrity of your files as ZFS uses unique digital identifiers referred to as checksums in order to prevent silent data corruption.

RAID in VPS Servers

The SSD drives that we use on the machines where we generate VPS servers function in RAID to make sure that any content which you upload will be available and intact all the time. At least a single drive is used for parity - one bit of info is added to any data cloned on it. In case a main drive stops working, it is changed and the information that will be duplicated on it is calculated between the rest of the drives and the parity one. This is done to make sure that the required data is copied and that no file is corrupted since the new drive will be a part of the RAID afterwards. We also use hard drives functioning in RAID on the backup servers, so in the event that you add this upgrade to your VPS plan, you'll use an even more reliable Internet hosting service because your content will be available on multiple drives irrespective of any sort of unpredicted hardware failure.