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 take advantage of multiple hard drives as one single logical unit. In other words, all the drives are used as one and the data on all of them is the same. This kind of a setup has 2 huge advantages over using just a single drive to save data - the first one is redundancy, so if one drive fails, the info will be accessed from the others, and the second one is improved performance as the input/output, or reading/writing operations will be distributed among multiple drives. There are different RAID types based on what number of drives are used, if reading and writing are both executed 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, etc. Determined by the exact setup, the error tolerance and the performance vary.
RAID in Cloud Hosting
The SSD drives that our cutting-edge cloud Internet hosting platform employs for storage work in RAID-Z. This type of RAID is created to work with the ZFS file system which runs on the platform and it uses the so-called parity disk - a specific drive where info stored on the other drives is copied with an additional bit added to it. In the event that one of the disks stops functioning, your Internet sites shall continue working from the other ones and as soon as we replace the bad one, the info which will be copied on it will be recovered from what is stored on the rest of the drives together with the data from the parity disk. This is performed so as to be able to recalculate the bits of each file adequately and to authenticate the integrity of the information cloned on the new drive. This is one more level of security for the content that you upload to your cloud hosting account along with the ZFS file system that compares a unique digital fingerprint for each file on all disk drives in real time.
RAID in Semi-dedicated Hosting
In case you host your Internet sites within a semi-dedicated hosting account from our firm, all the content you upload will be saved on SSD drives that work in RAID-Z. With this form of RAID, at least one of the hard disks is employed for parity - when data is synced between the drives, an additional bit is added to it on the parity one. The reasoning behind this is to ensure the integrity of the data which is cloned to a new drive in case one of the drives in the RAID breaks down since the site content being copied on the new disk is recalculated from the data on the standard hard drives and on the parity one. An additional advantage of RAID-Z is that even in the event that a disk drive stops working, the system can switch to a different one quickly without service disruptions of any kind. RAID-Z adds one more level of safety for the content that you upload on our cloud Internet hosting platform along with the ZFS file system which uses unique checksums as a way to verify the integrity of each and every file.
RAID in VPS Web Hosting
The physical servers where we create virtual private server work with extremely fast SSD drives which will boost the speed of your websites substantially. The hard drives operate in RAID to make sure that you will not lose any information as a result of a power loss or a hardware failure. The production servers use multiple drives where the data is stored and one disk is used for parity i.e. one bit is added to all the data copied on it, which makes it easier to recover the content without any loss in the event a main drive breaks down. In case you use our backup service, your information will be kept on a separate machine which uses standard hard-disk drives and although there is no parity one in this case, they are also in a RAID to guarantee that we will have a backup copy of your content at all times. With this type of configuration your info will always be safe as it will be available on many disk drives.