RAID, or Redundant Array of Independent Disks, is a technology for keeping data on multiple hard disks which function together as a single logical unit. The drives can be physical or logical i.e. in the aforementioned case one drive is split into individual ones using virtualization software. Either way, the very same information is stored on all the drives and the key advantage of employing this kind of a setup is that in the event that a drive breaks down, the data will still be available on the remaining ones. Having a RAID also improves the overall performance because the input and output operations will be spread among a few drives. There are several types of RAID based on how many drives are used, whether writing is performed on all drives in real time or just on one, and how the info is synchronized between the hard drives - whether it is recorded in blocks on one drive after another or all of it is mirrored from one on the others. These factors imply that the fault tolerance and the performance between the various RAID types could differ.

RAID in Shared Hosting

Our cutting-edge cloud web hosting platform where all shared hosting accounts are generated employs super fast SSD drives instead of the standard HDDs, and they function in RAID-Z. With this setup, multiple hard disks function together and at least 1 is a dedicated parity disk. Put simply, when data is written on the rest of the drives, it's duplicated on the parity one adding an extra bit. This is carried out for redundancy as even if some drive fails or falls out of the RAID for whatever reason, the info can be rebuilt and verified thanks to the parity disk and the data saved on the other ones, so not a thing will be lost and there won't be any service disturbances. This is one more level of security for your data in addition to the state-of-the-art ZFS file system which 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 company, all of the content you upload will be stored on SSD drives which operate in RAID-Z. With this type of RAID, at least one of the hard disks is employed for parity - when data is synced between the hard drives, an extra bit is included in it on the parity one. The idea behind this is to guarantee the integrity of the information that is duplicated to a brand new drive in the event that one of the disks in the RAID stops functioning since the site content being copied on the new disk is recalculated from the information on the standard hard drives and on the parity one. Another advantage of RAID-Z is the fact that even in the event that a drive fails, the system could switch to another one instantly without service disruptions of any kind. RAID-Z adds an extra level of safety for the content you upload on our cloud Internet hosting platform along with the ZFS file system which uses unique checksums so as to verify the integrity of each and every file.