RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that enables a system to take advantage of multiple hard drives as a single logical unit. Simply put, all drives are used as one and the information on all of them is the same. This type of a setup has two key advantages over using just a single drive to save data - the first is redundancy, so if one drive stops working, the info will be accessed from the others, and the second is better performance since the input/output, or reading/writing operations will be spread among a number of drives. You can find different RAID types based on how many drives are employed, if reading and writing are both done from all of the drives concurrently, if data is written in blocks on one drive after another or is mirrored between drives in the same time, etcetera. Determined by the particular setup, the fault tolerance and the performance could differ.
RAID in Hosting
The SSD drives which our cutting-edge cloud Internet hosting platform employs for storage operate in RAID-Z. This kind of RAID is developed to work with the ZFS file system that runs on the platform and it takes advantage of the so-called parity disk - a specific drive where data stored on the other drives is duplicated with an additional bit added to it. If one of the disks fails, your sites will continue working from the other ones and after we replace the faulty one, the info which will be duplicated on it will be recovered from what is stored on the rest of the drives together with the information from the parity disk. This is done so as to be able to recalculate the bits of each file properly and to confirm the integrity of the info copied on the new drive. This is one more level of security for the information which you upload to your hosting account along with the ZFS file system which compares a unique digital fingerprint for every single file on all drives in real time.
RAID in Semi-dedicated Servers
If you host your Internet sites in a semi-dedicated server account from our firm, any content that you upload will be stored on SSD drives which operate in RAID-Z. With this type of RAID, at least 1 of the hard drives is used for parity - when data is synced between the hard drives, an additional bit is added to it on the parity one. The reasoning behind this is to guarantee the integrity of the info that is copied to a new drive in case one of the disks in the RAID fails since the website content being copied on the new disk is recalculated from the info on the standard disk drives and on the parity one. Another advantage of RAID-Z is the fact that even if a disk drive stops functioning, the system could switch to a different one promptly without service interruptions of any sort. RAID-Z adds an additional level of protection for the content that you upload on our cloud web hosting platform along with the ZFS file system that uses unique checksums to authenticate the integrity of each file.
RAID in VPS Servers
All VPS server accounts that our company offers are created on physical servers that employ SSD drives functioning in RAID. At least one drive is employed for parity - one extra bit is included in the data copied on it and in case a main disk fails, this bit makes it simpler to recalculate the bits of the files on the damaged disk drive so that the accurate info is restored on the new drive added to the RAID. Meanwhile, your Internet sites will remain online as all the data will still load from at least one other hard disk. In case you add routine backups to your VPS plan, a copy of the data will be saved on standard hard drives which also operate in RAID because we want to make sure that any sort of site content you upload will be risk-free at all times. Working with multiple hard drives in RAID for all the main and backup servers permits us to offer fast and reliable hosting service.