Redundant Array of Independent Disks, or RAID, is a way of storing content on several hard drives concurrently. A RAID can be software or hardware depending on the drives that are used - physical or logical ones, still what is common between them is that they all operate as just one single unit where information is stored. The main advantage of using a RAID is redundancy as the information on all drives will be the same all the time, so even in the event that some drive fails for whatever reason, the data will still be available on the rest of the drives. The overall performance will also improve since the reading and writing processes will be split between a number of drives, so a single one won't be overloaded. There are different kinds of RAIDs where the effectiveness and fault tolerance may differ according to the exact setup - whether data is written on all of the drives in real time or it is written on a single drive and afterwards mirrored on another, what amount of drives are used for the RAID, etc.

RAID in Cloud Hosting

The SSD drives that our cutting-edge cloud hosting platform uses for storage operate in RAID-Z. This kind of RAID is designed to work with the ZFS file system which runs on the platform and it employs the so-called parity disk - a specific drive where information stored on the other drives is duplicated with an additional bit added to it. If one of the disks stops working, your sites shall continue working from the other ones and as soon as we replace the problematic one, the data which will be duplicated on it will be rebuilt from what is stored on the other drives along with the info from the parity disk. This is done so as to be able to recalculate the bits of every file adequately and to verify the integrity of the info cloned on the new drive. This is an additional level of security for the content you upload to your cloud hosting account together with the ZFS file system that analyzes a special digital fingerprint for every single file on all of the hard drives in real time.

RAID in Semi-dedicated Servers

The RAID type which we employ for the cloud web hosting platform where your semi-dedicated server account shall be created is called RAID-Z. What's different about it is that at least one of the disks is employed as a parity drive. Put simply, whenever any data is copied on this specific drive, one more bit is included to it and in case a faulty disk is replaced, the data that will be copied on it is a combination of the data on the remaining drives in the RAID and that on the parity one. We do this to guarantee that your data is intact. Throughout this process, your websites will be functioning normally as RAID-Z makes it possible for 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 which uses checksums to ensure that no data shall get silently corrupted on our servers, you won't need to worry about the integrity of your files.

RAID in VPS Servers

The physical servers where we make VPS server work with fast SSD drives that will increase the speed of your websites considerably. The disk drives work in RAID to ensure that you won't lose any data because of a power loss or a hardware breakdown. The production servers work with multiple drives where the info is saved and one disk is used for parity i.e. one bit is added to all the data copied on it, that makes it much easier to recover the site content without any loss if a main drive stops working. If you choose our backup service, your information will be kept on an independent machine which uses standard hard-disk drives and though there is no parity one in this case, they are also in a RAID to ensure that we will have a backup copy of your website content all the time. With this type of setup your data will always be safe as it will be available on a lot of drives.