Redundant Array of Independent Disks, or RAID, is a method of keeping content on several hard drives concurrently. A RAID can be software or hardware depending on the HDDs which are used - physical or logical ones, but what is common between them is that they all perform as just one single unit where data is stored. The main advantage of using a RAID is redundancy as the information on all the drives shall be identical at all times, so even in the event that a drive fails for whatever reason, the data will still be present on the other drives. The overall performance is also better because the reading and writing processes will be split between various drives, so a single one can't be overloaded. There are different types of RAIDs where the performance and fault tolerance could differ depending on the specific setup - whether information is written on all of the drives in real time or it is written on one drive and then mirrored on another, the number of drives are used for the RAID, and so on.

RAID in Cloud Web Hosting

The SSD drives which our cutting-edge cloud hosting platform uses for storage function in RAID-Z. This kind of RAID is intended to work with the ZFS file system which runs on the platform and it takes advantage of the so-called parity disk - a special drive where data kept on the other drives is duplicated with an additional bit added to it. In case one of the disks fails, your sites will continue working from the other ones and after we replace the faulty one, the information that will be duplicated on it will be rebuilt from what is stored on the rest of the drives together with the info from the parity disk. This is performed so as to be able to recalculate the bits of every file correctly and to confirm the integrity of the information copied on the new drive. This is one more level of security for the information which you upload to your cloud web hosting account in addition to the ZFS file system which analyzes a special digital fingerprint for every single file on all of the disk drives in real time.

RAID in Semi-dedicated Servers

The RAID type that we employ for the cloud Internet hosting platform where your semi-dedicated server account will be created is named RAID-Z. What's different about it is that at least one of the disks is used as a parity drive. Put simply, whenever any kind of data is duplicated on this specific disk drive, one more bit is added to it and if a defective disk is replaced, the information that will be cloned on it is a mix of the data on the other hard drives in the RAID and that on the parity one. This is done to ensure that the info is intact. Throughout this process, your websites will be up and running normally because RAID-Z allows for an entire drive to fail without service disturbances and it simply works by using one of the remaining ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to warrant that no data can get silently corrupted on our servers, you will never have to worry about the integrity of your files.