RAID, or Redundant Array of Independent Disks, is a technology of keeping data on multiple hard disks that work together as a single logical unit. The drives could be physical or logical i.e. in the latter case one drive is split into different ones using virtualization software. In any case, exactly the same data is saved on all of the drives and the key benefit of employing this kind of a setup is that in case a drive breaks down, the data will still be available on the remaining ones. Having a RAID also improves the overall performance because the input and output operations will be spread among a couple of drives. There are several kinds of RAID dependant upon how many drives are used, whether writing is performed on all of the drives in real time or just on a single one, and how the info is synced between the drives - whether it is recorded in blocks on one drive after another or it is mirrored from one on the others. These factors show that the fault tolerance as well as the performance between the various RAID types can differ.

RAID in Shared Website Hosting

Our cutting-edge cloud Internet hosting platform where all shared website hosting accounts are created employs quick SSD drives as opposed to the classic HDDs, and they operate in RAID-Z. With this setup, multiple hard disks function together and at least a single one is a dedicated parity disk. Basically, when data is written on the rest of the drives, it is cloned on the parity one adding an extra bit. This is carried out for redundancy as even if some drive fails or falls out of the RAID for whatever reason, the information can be rebuilt and verified thanks to the parity disk and the data saved on the other ones, therefore not a single thing will be lost and there will not be any service disturbances. This is one more level of protection for your data in addition to the revolutionary ZFS file system that uses checksums to make sure that all of the data on our servers is intact and is not silently corrupted.

RAID in Semi-dedicated Servers

The data uploaded to any semi-dedicated server account is saved on SSD drives that function in RAID-Z. One of the drives in type of a configuration is used for parity - each time data is copied on it, an extra bit is added. In case a disk turns out to be defective, it will be taken out of the RAID without interrupting the operation of the sites since the data will load from the rest of the drives, and when a brand new drive is added, the information that will be cloned on it will be a combination between the information on the parity disk and data saved on the other drives in the RAID. That is done in order to ensure that the information which is being copied is accurate, so the moment the new drive is rebuilt, it can be included in the RAID as a production one. This is an extra guarantee for the integrity of your information because the ZFS file system which runs on our cloud Internet hosting platform compares a special checksum of all of the copies of the files on the various drives to avoid any chance of silent data corruption.

RAID in VPS Servers

All VPS server accounts which our company offers are created on physical servers that use SSD drives functioning in RAID. At least 1 drive is intended for parity - one additional bit is included in the information duplicated on it and in case a main disk fails, this bit makes it simpler to recalculate the bits of the files on the damaged drive so that the correct information is recovered on the new drive included in the RAID. Meanwhile, your sites will still be online as all the info will still load from at least one more drive. In case you add routine backups to your VPS plan, a copy of the data will be saved on standard disk drives which also function in RAID because we want to make sure that any kind of site content you add will be protected all of the time. Employing multiple hard disks in RAID for all of the main and backup servers allows us to offer fast and reliable Internet hosting service.