RAID

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Redundant Array of Independent Disks, or RAID, is a method of storing content on a number of hard disk drives at the same time. A RAID could be software or hardware based on the hard drives which are used - physical or logical ones, yet what’s common between them is that they all work as just one single unit where info is kept. The key advantage of using a RAID is redundancy as the data on all of the drives is identical all of the time, so even in the event that one of the drives fails for whatever reason, the info will still be available on the other drives. The general performance will also improve as the reading and writing processes will be split between different drives, so a single one won't be overloaded. There are different kinds of RAIDs where the performance and fault tolerance may differ based on the specific 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 amount of drives are used for the RAID, etcetera.

RAID in Shared Hosting

The drives which we use for storage with our ground-breaking cloud Internet hosting platform are not the traditional HDDs, but extremely fast NVMes. They function in RAID-Z - a special setup intended for the ZFS file system that we use. All of the content that you upload to the shared hosting account will be kept on multiple drives and at least one of them shall be employed as a parity disk. This is a special drive where an additional bit is added to any content copied on it. In case a disk in the RAID stops functioning, it'll be changed without service interruptions and the information will be rebuilt on the new drive by recalculating its bits using the data on the parity disk along with that on the other disks. This is done to guarantee the integrity of the information and along with the real-time checksum authentication which the ZFS file system runs on all drives, you'll never need to worry about the loss of any info no matter what.

RAID in Semi-dedicated Servers

The data uploaded to any semi-dedicated server account is kept on NVMe drives which operate in RAID-Z. One of the drives in this kind of a setup is used for parity - each time data is cloned 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 disturbing the operation of the Internet sites because the data will load from the rest of the drives, and when a new drive is added, the info which will be copied on it will be a mix between the information on the parity disk and data kept on the other drives in the RAID. That is done in order to guarantee that the info that is being duplicated is accurate, so the moment the new drive is rebuilt, it could be included in the RAID as a production one. This is an extra guarantee for the integrity of your information as the ZFS file system that runs on our cloud web hosting platform analyzes a unique checksum of all of the copies of your files on the separate drives so as to avoid any probability of silent data corruption.

RAID in VPS Servers

The NVMe drives that we use on the machines where we set up VPS servers work in RAID to ensure that any content that you upload will be available and intact at all times. At least a single drive is used for parity - one bit of data is added to any data copied on it. In the event that a main drive breaks down, it is replaced and the data which will be duplicated on it is calculated between the other drives and the parity one. This is done to ensure that the right data is copied and that not a single file is corrupted because the new drive will be included in the RAID afterwards. Also, we use hard disk drives operating in RAID on the backup servers, so if you add this upgrade to your VPS package, you will use an even more reliable hosting service because your content will be available on multiple drives regardless of any type of unpredicted hardware malfunction.