RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that makes it possible for a system to employ multiple hard drives as one single logical unit. Simply put, all drives are used as one and the information on all of them is the same. Such a setup has 2 major advantages over using just a single drive to store data - the first one is redundancy, so in the event that one drive breaks down, the information will be accessible through the others, and the second is improved performance because the input/output, or reading/writing operations will be spread among several drives. You can find different RAID types based on how many drives are employed, if reading and writing are both handled from all of the drives at the same time, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and many others. According to the particular setup, the fault tolerance and the performance vary.
RAID in Web Hosting
The SSD drives that our cutting-edge cloud Internet hosting platform employs for storage work in RAID-Z. This sort of RAID is created 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 information saved on the other drives is duplicated with an additional bit added to it. In the event that one of the disks fails, your websites shall continue working from the other ones and as soon as we replace the bad one, the information which will be copied on it will be recovered from what is stored on the remaining drives as well as the information from the parity disk. This is done in order to be able to recalculate the elements of each file adequately and to confirm the integrity of the info duplicated on the new drive. This is another level of security for the information that you upload to your web hosting account in addition to the ZFS file system that analyzes a special digital fingerprint for each file on all of the hard drives in real time.
RAID in Semi-dedicated Hosting
If you host your Internet sites in a semi-dedicated hosting account from our company, all the content you upload will be stored on SSD drives which operate in RAID-Z. With this type of RAID, at least 1 of the drives is used for parity - when data is synchronized between the hard drives, an extra bit is added to it on the parity one. The reasoning behind this is to guarantee the integrity of the info that is cloned to a brand new drive if one of the hard drives in the RAID stops working 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 the fact that even in case a drive stops working, the system could switch to a different one quickly without service disturbances of any type. RAID-Z adds an additional level of protection for the content which you upload on our cloud web hosting platform together with the ZFS file system which uses unique checksums so as to verify the integrity of every single file.
RAID in VPS Hosting
All virtual private server accounts which we provide are made on physical servers that use SSD drives operating in RAID. At least one drive is employed for parity - one additional bit is added to the information duplicated on it and if a main disk fails, this bit makes it much simpler to recalculate the bits of the files on the failed hard disk so that the right data is recovered on the new drive included in the RAID. Meanwhile, your websites will still be online as all the data will still load from at least one other drive. In the event that you add routine backups to your VPS plan, a copy of the data will be stored on standard hard disks that also operate in RAID as we want to make sure that any sort of website content you upload will be safe and sound at all times. Using multiple drives in RAID for all main and backup servers allows us to offer fast and reliable hosting service.