Redundant Array of Independent Disks, or RAID, is a way of keeping content on multiple hard disk drives concurrently. A RAID might be software or hardware based on the hard drives that are used - physical or logical ones, but what’s common between them is the fact that they all perform as one single unit where your information is saved. The biggest advantage of using a RAID is redundancy as the data on all drives is the same all the time, so even in case some drive fails for some reason, the data will still be available on the rest of the drives. The general performance is enhanced as well as the reading and writing processes will be split between multiple drives, so a single one will not be overloaded. There're different kinds of RAIDs where the functionality and fault tolerance can vary based on the particular setup - whether your data is written on all the drives in real time or it is written on a single drive and after that mirrored on another, what amount of drives are used for the RAID, etcetera.

RAID in Website Hosting

The hard disks that we use for storage with our state-of-the-art cloud Internet hosting platform are not the traditional HDDs, but high-speed solid-state drives (SSD). They work in RAID-Z - a special setup developed for the ZFS file system that we work with. All the content that you upload to your website hosting account will be kept on multiple disk drives and at least 1 will be used as a parity disk. This is a special drive where an extra bit is included to any content copied on it. In case a disk in the RAID fails, it'll be changed with no service disruptions and the data will be rebuilt on the new drive by recalculating its bits using the data on the parity disk along with that on the remaining disks. This is done so as to ensure the integrity of the info and together with the real-time checksum verification that the ZFS file system runs on all drives, you will never have to be concerned about losing any information no matter what.

RAID in Semi-dedicated Servers

If you host your Internet sites in a semi-dedicated server account from our company, all the content which you upload will be saved on SSD drives that work in RAID-Z. With this kind of RAID, at least 1 of the drives is employed for parity - when data is synchronized between the drives, an additional bit is added to it on the parity one. The purpose behind this is to ensure the integrity of the data which is cloned to a brand new drive in the event that one of the hard drives in the RAID stops functioning since the site content being copied on the brand new disk is recalculated from the information on the standard disk drives and on the parity one. An additional advantage of RAID-Z is that even in case a disk drive fails, the system can easily switch to a different one immediately without service interruptions of any type. RAID-Z adds an extra level of security for the content which you upload on our cloud 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 Servers

The SSD drives that we use on the physical machines where we create VPS servers operate in RAID to make sure that any content which you upload will be available and intact at all times. At least 1 drive is used for parity - one bit of info is added to any data copied on it. In case a main drive fails, it is changed and the info which will be duplicated on it is calculated between the rest of the drives and the parity one. This is done to make sure that the correct info is copied and that not a single file is corrupted as the new drive will be incorporated into the RAID afterwards. We also use hard disks functioning in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you will use an even more reliable web hosting service as your content will be available on multiple drives regardless of any kind of unforeseen hardware failure.