RAID, or Redundant Array of Independent Disks, is a technology for storing data on multiple hard disk drives that work together as one logical unit. The drives could be physical or logical i.e. in the second case a single drive is split into independent ones via virtualization software. Either way, exactly the same information is stored on all the drives and the basic benefit of using this type of a setup is that in case a drive fails, the data will still be available on the other ones. Having a RAID also improves the overall performance as the input and output operations will be spread among several drives. There are several kinds of RAID dependant upon how many drives are used, whether writing is performed 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. All of these factors indicate that the error tolerance and the performance between the different RAID types may differ.

RAID in Shared Hosting

The SSD drives which our cutting-edge cloud hosting platform employs for storage operate in RAID-Z. This sort of RAID is developed to work with the ZFS file system that runs on the platform and it works by using the so-called parity disk - a special drive where data stored on the other drives is cloned with an additional bit added to it. In case one of the disks fails, your Internet sites will continue working from the other ones and as soon as we replace the problematic one, the info that will be duplicated on it will be recovered from what is stored on the other drives together with the information from the parity disk. This is done so as to be able to recalculate the bits of each and every file properly and to validate the integrity of the information copied on the new drive. This is one more level of security for the content you upload to your shared hosting account in addition to the ZFS file system that compares a special digital fingerprint for each file on all the drives in real time.

RAID in Semi-dedicated Servers

The RAID type which we use for the cloud hosting platform where your semi-dedicated server account will be created is known as RAID-Z. What is different about it is that at least one of the disks is used as a parity drive. Simply put, whenever any kind of data is copied on this specific hard drive, one more bit is added to it and in case a problematic disk is changed, the data that will be copied on it is a combination of the data on the other hard disks in the RAID and that on the parity one. This is done to make sure that your data is intact. Throughout this process, your Internet sites will be functioning normally because RAID-Z makes it possible for an entire drive to fail without any service disruptions and it simply uses one of the other ones as the main production drive. Employing RAID-Z together with the ZFS file system that uses checksums to ensure that no data shall get silently corrupted on our servers, you won't need to worry about the integrity of your files.

RAID in VPS Servers

All VPS server accounts that we offer are generated on physical servers that use SSD drives operating in RAID. At least 1 drive is employed for parity - one additional bit is included in the information copied on it and if a main disk fails, this bit makes it simpler to recalculate the bits of the files on the failed disk drive so that the right data is restored on the new drive included in the RAID. Meanwhile, your websites will still be online as all the information will still load from at least 1 more hard disk. In the event that you add regular backups to your VPS package, a copy of your info will be kept on standard disk drives which also function in RAID because we want to make sure that any kind of website content you add will be safe and sound all of the time. Using multiple hard drives in RAID for all of the main and backup servers permits us to offer fast and reliable web hosting service.