Redundant Array of Independent Disks, or RAID, is a way of keeping content on a number of hard drives at the same time. A RAID might be software or hardware depending on the drives that are used - physical or logical ones, still what’s common between them is the fact that they all work as just a single unit where your information is saved. The top advantage of using a RAID is redundancy because the data on all of the drives will be identical all of the time, so even if one of the drives fails for whatever reason, the data will still be present on the other drives. The general performance will also improve since the reading and writing processes will be split between different drives, so a single one will never be overloaded. There are different sorts of RAIDs where the performance and fault tolerance can vary based on the specific setup - whether info is written on all of the drives real-time or it's written on a single drive and after that mirrored on another, what amount of drives are used for the RAID, etcetera.

RAID in Shared Web Hosting

The SSD drives which our cutting-edge cloud hosting platform employs for storage function in RAID-Z. This type of RAID is designed to work with the ZFS file system that runs on the platform and it uses the so-called parity disk - a specific drive where data stored on the other drives is copied with an additional bit added to it. In the event that one of the disks stops functioning, your Internet sites will continue working from the other ones and once we replace the faulty one, the info that will be duplicated on it will be recovered from what is stored on the remaining drives as well as the info from the parity disk. This is done so as to be able to recalculate the bits of each file correctly and to validate the integrity of the information copied on the new drive. This is one more level of security for the info which you upload to your shared web hosting account in addition to the ZFS file system that analyzes a unique digital fingerprint for each file on all of the drives in real time.

RAID in Semi-dedicated Servers

The data uploaded to any semi-dedicated server account is saved on SSD drives that operate in RAID-Z. One of the drives in type of a configuration is used for parity - any time data is cloned on it, an extra bit is added. In case a disk turns out to be problematic, it will be taken out of the RAID without disturbing the work of the websites since the data will load from the rest of the drives, and when a brand new drive is included, the information which will be copied on it will be a combination between the data on the parity disk and data stored on the other drives in the RAID. This is done to ensure that the information that is being duplicated is accurate, so as soon as the new drive is rebuilt, it can be included in the RAID as a production one. This is an extra warranty for the integrity of your information because the ZFS file system that runs on our cloud Internet hosting platform compares a special checksum of all of the copies of the files on the various drives in order to avoid any chance of silent data corruption.

RAID in VPS Servers

The physical servers where we generate VPS server work with extremely fast SSD drives which will increase the speed of your websites considerably. The disk drives operate in RAID to ensure that you will not lose any information as a result of a power loss or a hardware failure. The production servers employ many different drives where the info is stored and one disk is used for parity i.e. one bit is added to all the information copied on it, that makes it easier to recover the site content without loss if a main drive stops working. In case you use our backup service, your information will be stored on a separate machine that uses standard hard-disk drives and even though there is no parity one in this case, they are also in a RAID to make sure that we will have a backup copy of your content all of the time. With this configuration your info will always be safe because it will be available on multiple drives.