Redundant Array of Independent Disks, or RAID, is a method of keeping content on a number of hard disk drives concurrently. A RAID could be software or hardware depending on the hard drives which are used - physical or logical ones, however what is common between them is that they all operate as a single unit where data is kept. The biggest advantage of using a RAID is redundancy since the information on all drives shall be the same all the time, so even in case one of the drives fails for some reason, the information will still be present on the rest of the drives. The overall performance is enhanced as well because the reading and writing processes will be split between different drives, so a single one can't be overloaded. There are different sorts of RAIDs where the functionality and fault tolerance may differ depending on the exact setup - whether data is written on all the drives in real time or it's written on one drive and afterwards mirrored on another, what number of drives are used for the RAID, etc.

RAID in Semi-dedicated Hosting

If you host your Internet sites in a semi-dedicated hosting account from our company, all the content which you upload will be stored on SSD drives which work 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 disks, an additional bit is included in it on the parity one. The reasoning behind this is to guarantee the integrity of the data which is cloned to a new drive in case one of the drives in the RAID breaks down because the content being copied on the brand new disk is recalculated from the information on the standard hard drives and on the parity one. An additional advantage of RAID-Z is the fact that even if a drive stops working, the system can easily switch to another one instantly without service disruptions of any kind. RAID-Z adds an extra level of security for the content which you upload on our cloud Internet hosting platform along with the ZFS file system which uses unique checksums as a way to verify the integrity of each file.

RAID in VPS Hosting

The SSD drives which we use on the machines where we generate virtual private servers operate in RAID to ensure that any content which you upload will be available and intact at all times. At least one drive is used for parity - one bit of information is added to any data cloned on it. In the event that a main drive breaks down, it is replaced and the info which will be copied on it is calculated between the remaining drives and the parity one. That’s done to ensure that the correct data is copied and that no file is corrupted as the new drive will be incorporated into the RAID afterwards. We also use hard disk drives operating in RAID on the backup servers, so in the event that you add this upgrade to your VPS package, you will use an even more reliable hosting service because your content will be available on multiple drives regardless of any kind of unexpected hardware malfunction.