RAID, which is an acronym of Redundant Array of Independent Disks, is a software or hardware storage virtualization technology which enables a system to use a number of hard drives as a single logical unit. To put it differently, all of the drives are used as one and the data on all of them is the same. This kind of a setup has two huge advantages over using just a single drive to keep data - the first one is redundancy, so in the event that one drive breaks down, the data will be accessed from the remaining ones, and the second is better performance as the input/output, or reading/writing operations will be distributed among several drives. You can find different RAID types depending on the number of drives are used, whether reading and writing are both handled from all the drives at the same time, whether data is written in blocks on one drive after another or is mirrored between drives in the same time, and many others. Depending on the exact setup, the fault tolerance and the performance vary.
RAID in Hosting
The SSD drives that our cutting-edge cloud hosting platform employs for storage function in RAID-Z. This kind of RAID is developed to work with the ZFS file system which runs on the platform and it works by using the so-called parity disk - a special drive where info stored on the other drives is copied with an additional bit added to it. If one of the disks stops functioning, your sites shall continue working from the other ones and as soon as we replace the bad one, the data that will be copied on it will be recovered from what is stored on the remaining drives along 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 authenticate the integrity of the info copied on the new drive. This is an additional level of security for the information that you upload to your hosting account along with the ZFS file system which analyzes a special digital fingerprint for each file on all of the drives in real time.
RAID in Semi-dedicated Servers
In case you host your websites within a semi-dedicated server account from our firm, all of the content you upload will be stored on SSD drives which operate in RAID-Z. With this form of RAID, at least 1 of the hard drives is employed for parity - when data is synced between the drives, an extra bit is included in it on the parity one. The reasoning behind this is to guarantee the integrity of the information which is copied to a new drive in case one of the hard drives in the RAID stops functioning since the site content being copied on the new disk is recalculated from the data on the standard drives and on the parity one. Another advantage of RAID-Z is that even in the event that a disk drive fails, the system can switch to another one immediately without service interruptions of any type. RAID-Z adds an additional level of security for the content which you upload on our cloud Internet hosting platform together with the ZFS file system that uses unique checksums so as to validate the integrity of each and every file.
RAID in VPS Servers
All VPS server accounts that we offer are made on physical servers that take advantage of SSD drives functioning in RAID. At least one drive is used for parity - one extra bit is included in the info copied on it and if a main disk fails, this bit makes it simpler to recalculate the bits of the files on the damaged disk drive so that the right information is recovered on the new drive added to the RAID. Meanwhile, your sites will stay online because all the info will still load from at least 1 more disk drive. In case you add regular backups to your VPS plan, a copy of the info will be kept on standard hard disks that also work in RAID as we want to make certain that any kind of website content you upload will be protected all the time. Using multiple hard drives in RAID for all main and backup servers allows us to offer fast and reliable Internet hosting service.