RAID, or Redundant Array of Independent Disks, is a technology of saving data on a number hard drives which operate together as one single logical unit. The drives could be physical or logical i.e. in the latter case one single drive is divided into separate ones using virtualization software. Either way, identical data is kept on all drives and the basic benefit of using such a setup is that in case a drive breaks down, the data will remain available on the other ones. Having a RAID also improves the overall performance since the input and output operations will be spread among a couple of drives. There are several types of RAID based on how many drives are used, whether writing is carried out on all drives in real time or just on a single one, and how the data is synchronized between the drives - whether it is written in blocks on one drive after another or all of it is mirrored from one on the others. All of these factors suggest that the error tolerance as well as the performance between the different RAID types may differ.

RAID in Shared Hosting

All content that you upload to your new shared hosting account will be placed on quick SSD drives which operate in RAID-Z. This configuration is built to employ the ZFS file system which runs on our cloud hosting platform and it adds an additional level of security for your website content in addition to the real-time checksum validation which ZFS uses to ensure the integrity of the data. With RAID-Z, the data is saved on several disks and at least one of them is a parity disk - whenever data is recorded on it, an additional bit is added, so if any drive stops working for whatever reason, the stability of the information can be verified by recalculating its bits in accordance with what is kept on the production hard drives and on the parity one. With RAID-Z, the functioning of our system will never be interrupted and it'll continue operating efficiently until the problematic drive is changed and the data is synced on it.

RAID in Semi-dedicated Servers

The RAID type that we use for the cloud hosting platform where your semi-dedicated server account will be created is named RAID-Z. What is different about it is that at least one of the disks is employed as a parity drive. In simple terms, whenever any data is cloned on this specific hard drive, one more bit is added to it and in the event that a problematic disk is replaced, the info that will be cloned on it is a combination of the data on the remaining hard drives in the RAID and that on the parity one. This is done to ensure that the data is intact. Throughout this process, your websites will be working normally as RAID-Z enables a whole drive to fail without causing any service disturbances and it simply works by using one of the other ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to ensure that no data can get silently corrupted on our servers, you won't ever have to worry about the integrity of your files.

RAID in VPS Servers

The physical servers where we generate VPS server employ super fast SSD drives which will increase the speed of your sites noticeably. The hard drives work in RAID to ensure that you won't lose any info as a result of a power loss or a hardware breakdown. The production servers work with many different drives where the info is saved 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 loss in the event a main drive stops working. In case you take advantage of our backup service, the data will be stored on an individual machine which uses standard hard-disk drives and despite the fact that there's no parity one in this case, they are also in a RAID to ensure that we will have a backup copy of your content all of the time. With this particular configuration your info will always be safe as it will be available on several disk drives.