RAID, which is short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which allows a system to take advantage of multiple hard drives as a single logical unit. In other words, all of the drives are used as one and the data on all of them is the same. Such a setup has 2 huge advantages over using just a single drive to keep data - the first one is redundancy, so in the event that one drive stops working, the info will be accessible from the others, and the second is better performance as the input/output, or reading/writing operations will be spread among different drives. There are different RAID types depending on what number of drives are employed, if reading and writing are both done from all of the drives simultaneously, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and so on. According to the particular setup, the fault tolerance and the performance could differ.

RAID in Web Hosting

All content that you upload to your new web hosting account will be saved on quick SSD drives which function in RAID-Z. This configuration is built to use 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 that ZFS uses to guarantee the integrity of the data. With RAID-Z, the info is saved on a couple of disks and at least one of them is a parity disk - whenever information is written on it, an additional bit is added, so if any drive stops working for some reason, the stability of the info can be verified by recalculating its bits in accordance with what is saved on the production hard drives and on the parity one. With RAID-Z, the operation of our system won't be interrupted and it'll continue functioning flawlessly until the malfunctioning drive is replaced and the information is synced on it.

RAID in Semi-dedicated Servers

The RAID type which we use for the cloud Internet hosting platform where your semi-dedicated server account shall be created is referred to as RAID-Z. What's different about it is that at least one of the disks is employed as a parity drive. Put simply, whenever any data is copied on this specific drive, one more bit is included to it and in the event that a problematic disk is changed, the information that will be copied on it is a mix of the data on the other hard disks in the RAID and that on the parity one. This is done to guarantee that the info is intact. Throughout this process, your sites will be working normally because RAID-Z allows for a whole drive to fail without any service disturbances and it simply uses one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system which uses checksums to ensure that no data will get silently corrupted on our servers, you won't ever have to worry about the integrity of your files.

RAID in VPS Servers

The SSD drives which we use on the physical machines where we generate VPS servers function in RAID to make sure that any content that you upload will be available and intact all the time. At least one drive is used 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 info which will be cloned on it is calculated between the other drives and the parity one. It's done this way to make sure that the needed info is copied and that no file is corrupted since the new drive will be incorporated into the RAID afterwards. We also use hard disk drives working in RAID on the backup servers, so in the event that you add this upgrade to your VPS package, you shall use an even more reliable Internet hosting service because your content will be available on multiple drives irrespective of any type of unexpected hardware failure.