RAID, or Redundant Array of Independent Disks, is a technology of storing data on multiple hard disk drives which function together as one single logical unit. The drives can be physical or logical i.e. in the second case one single drive is split into individual ones using virtualization software. Either way, the very same info is saved on all of the drives and the key benefit of employing this type of a setup is that in case a drive breaks down, the data shall still be available on the other ones. Having a RAID also improves the overall performance as the input and output operations will be spread among a couple of drives. There are several kinds of RAID based on how many hard drives are used, whether writing is carried out on all the drives in real time or just on a single one, and how the data is synced between the hard drives - whether it's written in blocks on one drive after another or it is mirrored from one on the others. All of these factors imply that the error tolerance and the performance between the different RAID types may vary.

RAID in Shared Hosting

All content that you upload to your new shared hosting account will be placed on fast SSD drives that work in RAID-Z. This setup is built to work with the ZFS file system that runs on our cloud Internet hosting platform and it adds another level of protection for your website content on top of the real-time checksum authentication which ZFS uses to guarantee the integrity of the data. With RAID-Z, the info is saved on a number of disks and at least one of them is a parity disk - whenever information is recorded on it, an extra bit is added, so if any drive fails for whatever reason, the stability of the info can be verified by recalculating its bits in accordance with what is stored on the production hard disks and on the parity one. With RAID-Z, the operation of our system will not be interrupted and it will continue working effectively until the malfunctioning drive is replaced and the info is synchronized on it.

RAID in Semi-dedicated Servers

In case you host your sites inside a semi-dedicated server account from our firm, all of the content which you upload will be stored on SSD drives which operate in RAID-Z. With this kind of RAID, at least one of the hard disks is employed for parity - when data is synchronized between the drives, an additional bit is included in it on the parity one. The idea behind this is to ensure the integrity of the information that is cloned to a new drive if one of the hard drives in the RAID fails as the content being copied on the brand new disk is recalculated from the data on the standard drives and on the parity one. Another advantage of RAID-Z is that even in case a disk drive stops functioning, the system can easily switch to a different one quickly without service disruptions of any type. RAID-Z adds an extra level of security for the content that you upload on our cloud web hosting platform in addition to the ZFS file system which uses unique checksums in order to verify the integrity of each file.

RAID in VPS Servers

The SSD drives that we use on the physical machines where we create VPS servers function in RAID to make sure that any content that you upload will be available and intact all of the time. At least one drive is employed for parity - one bit of data is added to any data copied on it. In case a main drive breaks down, it is changed and the data that will be copied on it is calculated between the other 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 because the new drive will be used in the RAID afterwards. Also, we use hard disk drives operating in RAID on the backup servers, so if you add this upgrade to your VPS package, you'll use an even more reliable web hosting service as your content will be available on multiple drives regardless of any sort of unpredicted hardware malfunction.