Redundant Array of Independent Disks, or RAID, is a method of storing content on several hard disk drives at the same time. A RAID could be software or hardware depending on the hard drives that are used - physical or logical ones, still what’s common between them is the fact that they all operate as one single unit where data is stored. The top advantage of employing a RAID is redundancy since the information on all drives is the same at all times, so even in case some drive fails for some reason, the information will still be available on the other drives. The general performance is enhanced as well as the reading and writing processes can be split between a number of drives, so a single one can't be overloaded. There're different kinds of RAIDs where the effectiveness and fault tolerance may differ according to the particular setup - whether info is written on all drives real-time or it is written on one drive and after that mirrored on another, what amount of drives are used for the RAID, and so on.

RAID in Shared Web Hosting

The drives that we use for storage with our revolutionary cloud Internet hosting platform are not the standard HDDs, but high-speed solid-state drives (SSD). They work in RAID-Z - a special setup created for the ZFS file system that we work with. Any content that you add to the shared web hosting account will be held on multiple drives and at least one will be used as a parity disk. This is a specific drive where an extra bit is included to any content copied on it. In case a disk in the RAID stops working, it'll be changed without any service interruptions and the information will be rebuilt on the new drive by recalculating its bits thanks to the data on the parity disk along with that on the other disks. This is done to guarantee the integrity of the information and together with the real-time checksum verification that the ZFS file system performs on all drives, you will never have to concern yourself with losing any info no matter what.

RAID in Semi-dedicated Servers

The data uploaded to any semi-dedicated server account is saved on SSD drives that function in RAID-Z. One of the drives in such a setup is used for parity - whenever data is copied on it, an extra bit is added. In case a disk turns out to be defective, it will be taken out of the RAID without interrupting the operation of the Internet sites as the data will load from the remaining drives, and when a brand new drive is added, the information which will be duplicated on it will be a mix between the data on the parity disk and data saved on the other drives in the RAID. This is done so as to guarantee that the info which is being copied is accurate, so as soon as the new drive is rebuilt, it could be integrated into the RAID as a production one. This is an extra warranty for the integrity of your information as the ZFS file system that runs on our cloud hosting platform compares a special checksum of all copies of the files on the various drives so as to avoid any probability of silent data corruption.

RAID in VPS Servers

The physical servers where we create VPS server work with super fast SSD drives that will boost the speed of your sites substantially. The hard drives function in RAID to ensure that you won't lose any info because of a power loss or a hardware failure. The production servers take advantage of multiple drives where the data is stored and one disk is used for parity i.e. one bit is added to all of the information copied on it, which makes it easier to recover the content without any loss in the event a main drive stops working. In case you take advantage of our backup service, your information will be kept on an individual machine which uses standard hard-disk drives and although there is no parity one in this case, they are also in a RAID to make sure that we will have a backup of your content at all times. With this configuration your info will always be safe since it will be available on many disk drives.