Redundant Array of Independent Disks, or RAID, is a way of keeping content on multiple hard disk drives concurrently. A RAID could be software or hardware depending on the hard drives which are used - physical or logical ones, still what’s common between them is the fact that they all work as just a single unit where information is stored. The key advantage of using a RAID is redundancy as the information on all of the drives is identical all of the time, so even in the event that a drive fails for whatever reason, the info will still be available on the other drives. The overall performance is enhanced as well since the reading and writing processes can be split between different drives, so a single one will never be overloaded. There are different sorts of RAIDs where the performance and fault tolerance could differ depending on the exact setup - whether your data is written on all of the drives in real time or it's written on one drive and then mirrored on another, the number of drives are used for the RAID, etc.

RAID in Hosting

The SSD drives that our cutting-edge cloud Internet hosting platform uses for storage operate in RAID-Z. This kind of RAID is developed to work with the ZFS file system which runs on the platform and it works by using the so-called parity disk - a special drive where info kept on the other drives is cloned with an additional bit added to it. In the event that one of the disks stops functioning, your Internet sites will continue working from the other ones and once we replace the faulty one, the data that will be cloned on it will be recovered from what is stored on the other drives as well as the data from the parity disk. This is performed so as to be able to recalculate the elements of each and every file correctly and to verify the integrity of the information duplicated on the new drive. This is one more level of security for the info that you upload to your hosting account in addition to the ZFS file system which compares a special digital fingerprint for every single file on all of the drives in real time.

RAID in Semi-dedicated Hosting

The information uploaded to any semi-dedicated hosting account is kept on SSD drives that work in RAID-Z. One of the drives in such a configuration is used for parity - each time data is copied on it, an additional bit is added. If a disk happens to be problematic, it will be removed from the RAID without disturbing the functioning of the websites because the data will load from the rest of the drives, and when a brand new drive is added, the information that will be copied on it will be a mix between the information on the parity disk and data kept on the other hard disks in the RAID. This is done so as to guarantee that the information which is being cloned is accurate, so once the new drive is rebuilt, it could be integrated into the RAID as a production one. This is an additional warranty for the integrity of your info as the ZFS file system that runs on our cloud web hosting platform analyzes a special checksum of all copies of your files on the separate drives so as to avoid any possibility of silent data corruption.

RAID in VPS Hosting

The SSD drives that we use on the machines where we generate virtual private servers work in RAID to make sure that any content which you upload will be available and intact all the time. At least a single drive is employed for parity - one bit of data is added to any data copied on it. If a main drive stops working, it is replaced and the information that will be duplicated on it is calculated between the rest of the drives and the parity one. That’s done to ensure that the correct data is copied and that not a single file is corrupted since the new drive will be used in the RAID afterwards. We also use hard drives working in RAID on the backup servers, so if you add this upgrade to your VPS plan, you'll use an even more reliable web hosting service since your content will be available on multiple drives regardless of any sort of unforeseen hardware malfunction.

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