Redundant Array of Independent Disks, or RAID, is a way of storing content on a number of hard disk drives concurrently. A RAID might be software or hardware depending on the HDDs which are used - physical or logical ones, yet what is common between them is that they all perform as just a single unit where data is saved. The top advantage of employing a RAID is redundancy as the info on all of the drives is exactly the same all the time, so even in the event that one of the drives fails for whatever reason, the info will still be present on the rest of the drives. The general performance will also improve since the reading and writing processes can be split between different drives, so a single one will never be overloaded. There are different types of RAIDs where the efficiency and fault tolerance may differ depending on the particular setup - whether information is written on all drives in real time or it is written on one drive and after that mirrored on another, what number of drives are used for the RAID, and many others.

RAID in Shared Website Hosting

The SSD drives that our cutting-edge cloud web hosting platform uses for storage operate in RAID-Z. This type of RAID is developed to work with the ZFS file system that runs on the platform and it takes advantage of the so-called parity disk - a special drive where info saved on the other drives is duplicated with an additional bit added to it. In case one of the disks fails, your sites will continue working from the other ones and after we replace the faulty one, the info which will be duplicated on it will be recovered from what is stored on the remaining drives together with the info from the parity disk. This is performed in order to be able to recalculate the elements of every file adequately and to verify the integrity of the info copied on the new drive. This is one more level of security for the info you upload to your shared website hosting account together with the ZFS file system which analyzes a special digital fingerprint for each and every file on all the disk drives in real time.

RAID in Semi-dedicated Servers

The information 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. If a disk turns out to be defective, it will be taken out of the RAID without interrupting the functioning of the Internet sites because the data will load from the rest of the drives, and when a new drive is included, the info that will be duplicated on it will be a blend between the information on the parity disk and data kept on the other drives in the RAID. This is done so as to ensure that the data that is being duplicated is accurate, so once the new drive is rebuilt, it could be integrated into the RAID as a production one. This is an additional guarantee for the integrity of your data because the ZFS file system which runs on our cloud hosting platform compares a special checksum of all of the copies of the files on the different drives to avoid any probability of silent data corruption.

RAID in VPS Servers

All VPS server accounts which we offer are created on physical servers that use SSD drives operating in RAID. At least 1 drive is used for parity - one additional bit is included in the data cloned on it and in case a main disk fails, this bit makes it much simpler to recalculate the bits of the files on the failed drive so that the correct data is recovered on the new drive added to the RAID. In the mean time, your sites will still be online since all the information will still load from at least 1 more drive. If you add regular backups to your VPS plan, a copy of your data will be stored on standard hard drives which also operate in RAID because we want to make sure that any kind of website content you upload will be protected all of the time. Employing multiple drives in RAID for all the main and backup servers permits us to offer fast and reliable web hosting service.