RAID

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RAID, which stands short for Redundant Array of Independent Disks, is a software or hardware storage virtualization technology that permits a system to use several hard drives as a single logical unit. In other words, all of the drives are used as one and the data on all of them is identical. This type of a configuration has 2 huge advantages over using a single drive to store data - the first one is redundancy, so if one drive breaks down, the information will be accessible through the others, and the second is better performance since the input/output, or reading/writing operations will be spread among multiple drives. There're different RAID types based on how many drives are used, if reading and writing are both handled from all the drives concurrently, if data is written in blocks on one drive after another or is mirrored between drives in the same time, and many others. Depending on the particular setup, the error tolerance and the performance vary.

RAID in Cloud Hosting

The hard disks that we use for storage with our state-of-the-art cloud web hosting platform are not the standard HDDs, but fast NVMes. They function in RAID-Z - a special setup designed for the ZFS file system which we use. Any content that you upload to the cloud hosting account will be saved on multiple hard drives and at least one shall be employed as a parity disk. This is a specific drive where an extra bit is included to any content copied on it. In case a disk in the RAID stops working, it will be replaced without any service disruptions and the information will be recovered on the new drive by recalculating its bits thanks to the data on the parity disk along with that on the other disks. This is done so as to ensure the integrity of the data and along with the real-time checksum validation that the ZFS file system executes on all drives, you won't ever have to be concerned about the loss of any info no matter what.

RAID in Semi-dedicated Servers

In case you host your websites inside a semi-dedicated server account from our company, any content which you upload will be held on NVMe drives which operate in RAID-Z. With this kind of RAID, at least 1 of the drives is employed for parity - when data is synchronized between the hard drives, an extra bit is included in it on the parity one. The idea behind this is to guarantee the integrity of the data which is cloned to a new drive if one of the hard drives in the RAID breaks down since the website content being copied on the brand new disk is recalculated from the data on the standard disk drives and on the parity one. An additional advantage of RAID-Z is that even in the event that a hard drive fails, the system can switch to a different one quickly without service interruptions of any type. RAID-Z adds one more level of protection for the content you upload on our cloud Internet hosting platform in addition to the ZFS file system that uses unique checksums to verify the integrity of every single file.