Redundant Array of Independent Disks, or RAID, is a way of saving content on a number of hard disk drives simultaneously. A RAID could be software or hardware depending on the hard drives that are used - physical or logical ones, still what is common between them is that they all work as just a single unit where info is stored. The top advantage of using a RAID is redundancy as the info on all drives shall be identical all of the time, so even if a drive fails for some reason, the data will still be available on the other drives. The overall performance is also enhanced because the reading and writing processes can be split between multiple drives, so a single one won't be overloaded. There are different sorts of RAIDs where the effectiveness and fault tolerance may differ according to the exact setup - whether info is written on all the drives in real time or it is written on a single drive and after that mirrored on another, what number of drives are used for the RAID, and so on.

RAID in Cloud Hosting

The SSD drives which our cutting-edge cloud web hosting platform uses for storage work in RAID-Z. This kind of RAID is developed to work with the ZFS file system that runs on the platform and it works by using the so-called parity disk - a specific drive where info located on the other drives is duplicated with an extra bit added to it. In the event that one of the disks stops working, your websites will continue working from the other ones and after we replace the problematic one, the information which will be duplicated on it will be recovered from what is stored on the rest of the drives along with the data from the parity disk. This is performed in order to be able to recalculate the bits of each and every file adequately and to verify the integrity of the information duplicated on the new drive. This is another level of security for the info you upload to your cloud hosting account together with the ZFS file system that analyzes a special digital fingerprint for each file on all of the drives in real time.

RAID in Semi-dedicated Hosting

The information uploaded to any semi-dedicated hosting account is stored on SSD drives which work in RAID-Z. One of the drives in type of a configuration is used for parity - every time data is cloned on it, an extra bit is added. If a disk happens to be problematic, it will be taken out of the RAID without interrupting the work of the websites because the data will load from the other drives, and when a brand new drive is added, the data that will be copied on it will be a mix between the data on the parity disk and data stored on the other hard drives in the RAID. That is done to guarantee that the info which is being copied is correct, so once the new drive is rebuilt, it can be integrated into the RAID as a production one. This is an extra warranty for the integrity of your data since the ZFS file system that runs on our cloud hosting platform analyzes a unique checksum of all copies of your files on the separate drives in order to avoid any chance of silent data corruption.