RAID, or Redundant Array of Independent Disks, is a technology of saving data on multiple hard drives which operate together as one single logical unit. The drives could be physical or logical i.e. in the second case a single drive is split into individual ones using virtualization software. In any case, identical information is kept on all of the drives and the main advantage of using this type of a setup is that in the event that a drive breaks down, the data will remain available on the remaining ones. Having a RAID also boosts the overall performance because the input and output operations will be spread among a few drives. There are several types of RAID dependant upon how many drives are used, whether writing is carried out on all the drives in real time or just on one, and how the info is synced between the drives - whether it's recorded in blocks on one drive after another or it is mirrored from one on the others. These factors indicate that the fault tolerance as well as the performance between the various RAID types could differ.
RAID in Cloud Hosting
The hard drives that we employ for storage with our state-of-the-art cloud hosting platform are not the traditional HDDs, but quick solid-state drives (SSD). They work in RAID-Z - a special setup created for the ZFS file system that we work with. Any content that you upload to the cloud hosting account will be kept on multiple drives and at least 1 will be used as a parity disk. This is a specific drive where a further bit is included to any content copied on it. In case a disk in the RAID stops working, it will be changed with no service disruptions and the info will be rebuilt on the new drive by recalculating its bits thanks to the data on the parity disk along with that on the remaining disks. This is done so as to ensure the integrity of the info and along with the real-time checksum validation that the ZFS file system executes on all drives, you won't ever have to concern yourself with the loss of any data no matter what.
RAID in Semi-dedicated Hosting
In case you host your Internet sites in a semi-dedicated hosting account from our firm, all the content you upload will be stored on SSD drives that work in RAID-Z. With this form of RAID, at least one of the disks is used for parity - when data is synced between the disks, an additional bit is included in it on the parity one. The purpose behind this is to ensure the integrity of the info that is cloned to a brand new drive if one of the hard 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. Another advantage of RAID-Z is the fact that even in the event that a hard drive fails, the system could switch to another one immediately without service disturbances of any sort. RAID-Z adds one more level of security for the content that you upload on our cloud hosting platform together with the ZFS file system which uses unique checksums to validate the integrity of each file.
RAID in VPS Hosting
All virtual private server accounts which our company offers are created on physical servers which use SSD drives working in RAID. At least one drive is used for parity - one extra bit is added to the information cloned on it and in case a main disk stops working, this bit makes it simpler to recalculate the bits of the files on the failed disk drive so that the correct data is restored on the new drive included in the RAID. In the mean time, your sites will stay online because all the data will still load from at least one more drive. If you add routine backups to your VPS plan, a copy of your information will be kept on standard disk drives which also operate in RAID because we want to make certain that any content you add will be safe and sound all of the time. Employing multiple drives in RAID for all the main and backup servers allows us to offer fast and reliable web hosting service.