Redundant Array of Independent Disks, or RAID, is a method of saving content on several hard disk drives concurrently. A RAID can be software or hardware depending on the HDDs which are used - physical or logical ones, still what’s common between them is the fact that they all perform as a single unit where info is kept. The top advantage of employing a RAID is redundancy as the information on all drives is the same all the time, so even in the event that some drive fails for some reason, the data will still be available on the rest of the drives. The overall performance is also better since the reading and writing processes could be split between different drives, so a single one will never be overloaded. There're different types of RAIDs where the efficiency and fault tolerance can vary according to the exact setup - whether info is written on all drives real-time or it is written on a single drive and then mirrored on another, what amount of drives are used for the RAID, etc.
RAID in Cloud Web Hosting
The SSD drives which our cutting-edge cloud web hosting platform uses for storage function in RAID-Z. This type of RAID is developed to work with the ZFS file system which runs on the platform and it employs the so-called parity disk - a specific drive where information located on the other drives is copied with an additional bit added to it. In the event that one of the disks stops functioning, your sites shall continue working from the other ones and after we replace the faulty one, the data which will be duplicated on it will be rebuilt from what is stored on the remaining drives as well as the info from the parity disk. This is performed in order to be able to recalculate the elements of every single file correctly and to validate the integrity of the information copied on the new drive. This is an additional level of security for the info which you upload to your cloud web hosting account in addition to the ZFS file system which compares a unique digital fingerprint for each file on all the hard drives in real time.
RAID in Semi-dedicated Servers
If you host your Internet sites in a semi-dedicated server account from our firm, all the content that you upload will be kept on SSD drives that work in RAID-Z. With this type of RAID, at least 1 of the hard disks is employed for parity - when data is synced between the disks, an additional bit is added to it on the parity one. The reasoning behind this is to ensure the integrity of the data that is duplicated to a new drive in case one of the hard drives in the RAID breaks down since the website content being copied on the brand new disk is recalculated from the info on the standard hard drives and on the parity one. Another advantage of RAID-Z is that even if a disk drive fails, the system can switch to another one promptly without service interruptions of any sort. RAID-Z adds an additional level of protection for the content which you upload on our cloud web hosting platform along with the ZFS file system that uses unique checksums so as to validate the integrity of each and every file.
RAID in VPS Servers
In case you use one of our VPS server packages, any content that you upload will be stored on SSD drives which function in RAID. At least 1 drive is employed for parity so as to guarantee the integrity of your info. In simple terms, this is a special drive where data is copied with one bit added to it. If a disk from the RAID stops functioning, your Internet sites will continue working and when a new disk takes the place of the malfunctioning one, the bits of the data that will be duplicated on it are calculated using the healthy and the parity drives. By doing this, any probability of corrupting data throughout the process is averted. We also use standard hard disk drives which operate in RAID for storing backup copies, so should you add this service to your VPS plan, your content will be stored on multiple drives and you'll never have to worry about its integrity even in the event of multiple drive breakdowns.