RAID

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RAID, or Redundant Array of Independent Disks, is a technology for keeping data on a number hard disk drives that work together as a single logical unit. The drives can be physical or logical i.e. in the aforementioned case a single drive is split into independent ones through virtualization software. Either way, the same data is kept on all the drives and the main 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. Employing a RAID also enhances the performance because the input and output operations will be spread among several drives. There are several kinds of RAID depending on 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 synchronized between the hard drives - whether it is written in blocks on one drive after another or all of it is mirrored from one on the others. All these factors suggest that the fault tolerance as well as the performance between the various RAID types may vary.

RAID in Shared Website Hosting

All of the content which you upload to your new shared website hosting account will be stored on quick SSD drives that function in RAID-Z. This setup is built to employ the ZFS file system that runs on our cloud Internet hosting platform and it adds an additional level of security for your site content on top of the real-time checksum authentication that ZFS uses to ensure the integrity of the data. With RAID-Z, the info is saved on a couple of disks and at least one is a parity disk - whenever info is recorded on it, an extra bit is added, so in the event that any drive stops working for some reason, the integrity of the information can be verified by recalculating its bits based on what is stored on the production disks and on the parity one. With RAID-Z, the functioning of our system will never be interrupted and it will continue working flawlessly until the malfunctioning drive is replaced and the information is synced on it.

RAID in Semi-dedicated Servers

The information uploaded to any semi-dedicated server account is saved on SSD drives that work in RAID-Z. One of the drives in type of a configuration is used for parity - every time data is copied on it, an extra bit is added. In case a disk turns out to be faulty, it will be taken out of the RAID without disturbing the functioning of the Internet sites as the data will load from the remaining drives, and when a brand new drive is included, the info which will be cloned on it will be a mix between the data on the parity disk and data saved on the other hard drives in the RAID. This is done to ensure that the information which is being cloned is accurate, so once 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 info because the ZFS file system which runs on our cloud hosting platform compares a special checksum of all the copies of your files on the different drives to be able to avoid any probability of silent data corruption.

RAID in VPS Servers

In case you take advantage of one of our VPS server plans, any content that you upload will be kept on SSD drives that work in RAID. At least one drive is intended for parity so as to guarantee the integrity of your information. In simple terms, this is a special drive where data is copied with one bit added to it. If a disk part of the RAID stops working, your Internet sites will continue working and when a new disk substitutes the defective one, the bits of the data that will be cloned on it are calculated by using the healthy and the parity drives. By doing this, any potential for corrupting data throughout the process is averted. We also employ ordinary hard disk drives which function in RAID for storing backups, so in case you include this service to your VPS package, your content will be kept on multiple drives and you won't ever have to worry about its integrity even in the event of multiple drive failures.