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

RAID in Web Hosting

Our cutting-edge cloud Internet hosting platform where all web hosting accounts are generated employs quick SSD drives instead of the classic HDDs, and they work in RAID-Z. With this configuration, multiple hard drives operate together and at least one of them is a dedicated parity disk. Basically, when data is written on the other drives, it's copied on the parity one adding an extra bit. This is performed for redundancy as even if a drive fails or falls out of the RAID for some reason, the information can be rebuilt and verified using the parity disk and the data saved on the other ones, therefore not a thing will be lost and there will be no service disturbances. This is one more level of security for your data along with the revolutionary ZFS file system that uses checksums to guarantee that all of the data on our servers is undamaged and is not silently corrupted.

RAID in Semi-dedicated Hosting

If you host your Internet sites in a semi-dedicated hosting account from our firm, all of the content that you upload will be kept on SSD drives which work in RAID-Z. With this kind of RAID, at least one of the drives is employed for parity - when data is synced between the disks, an additional bit is added to it on the parity one. The reasoning behind this is to guarantee the integrity of the info which is cloned to a new drive in the event that one of the hard drives in the RAID breaks down as the website content being copied on the brand new disk is recalculated from the info on the standard drives and on the parity one. Another advantage of RAID-Z is that even in the event that a disk drive stops working, the system can easily switch to another one right away without service interruptions of any sort. RAID-Z adds one more level of safety for the content that you upload on our cloud web hosting platform in addition to the ZFS file system that uses unique checksums so as to verify the integrity of each file.

RAID in VPS

The SSD drives that we use on the physical machines where we set up virtual private servers function in RAID to make sure that any content you upload will be available and intact all of the time. At least 1 drive is used for parity - one bit of information is added to any data cloned on it. If a main drive fails, it is replaced and the info that will be copied on it is calculated between the remaining drives and the parity one. That’s done to make sure that the required information is copied and that not a single file is corrupted as the new drive will be used in the RAID afterwards. We also use hard disks functioning in RAID on the backup servers, so if you add this upgrade to your VPS plan, you'll use an even more reliable Internet hosting service as your content will be available on multiple drives regardless of any kind of unexpected hardware failure.