RAID, or Redundant Array of Independent Disks, is a technology of storing data on a number hard disks which function together as one logical unit. The drives can be physical or logical i.e. in the latter case one drive is divided into individual ones through virtualization software. Either way, the very same data is saved on all drives and the basic advantage of using such a setup is that in case a drive breaks down, the data will still be available on the remaining ones. Using a RAID also boosts the overall performance because the input and output operations will be spread among a few drives. There are several types of RAID based on how many hard disks are used, whether writing is done on all drives in real time or just on one, and how the info is synced between the hard drives - whether it is recorded in blocks on one drive after another or all of it is mirrored from one on the others. All these factors show that the error tolerance as well as the performance between the various RAID types can differ.
RAID in Cloud Website Hosting
All the content that you upload to your new cloud website hosting
account will be held on fast SSD drives that function in RAID-Z. This setup is built to employ the ZFS file system that runs on our cloud web hosting platform and it adds another level of security for your content in addition to the real-time checksum validation that ZFS uses to ensure the integrity of the data. With RAID-Z, the info is stored on a number of disks and at least 1 is a parity disk - whenever information is recorded on it, an additional bit is added, so in the event that any drive stops working for some reason, the integrity of the info can be verified by recalculating its bits in accordance with what is saved on the production disks and on the parity one. With RAID-Z, the operation of our system will not be interrupted and it will continue operating smoothly until the faulty drive is changed and the data is synchronized on it.
RAID in Semi-dedicated Hosting
The RAID type that we use for the cloud web hosting platform where your semi-dedicated hosting
account will be created is referred to as RAID-Z. What's different about it is that at least 1 of the disks is used as a parity drive. Put simply, whenever any data is duplicated on this special hard drive, one more bit is added to it and if a defective disk is changed, the data that will be copied on it is a mix of the data on the other hard disks in the RAID and that on the parity one. This is done to guarantee that your data is intact. During this process, your Internet sites will be working normally because RAID-Z allows for a whole drive to fail without service interruptions and it simply works by using one of the other ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to guarantee that no data will get silently corrupted on our servers, you will never need to worry about the integrity of your files.
RAID in VPS Web Hosting
The physical servers where we generate virtual private server
use quick SSD drives which will boost the speed of your websites noticeably. The hard drives function in RAID to guarantee that you will not lose any info as a result of a power loss or a hardware malfunction. The production servers work with multiple drives where the data is kept and one disk is used for parity i.e. one bit is added to all the information copied on it, that makes it much easier to recover the content without loss if a main drive breaks down. In case you pick our backup service, your information will be stored on a separate machine that uses standard hard-disk drives and though there isn't a parity one in this case, they are also in a RAID to make sure that we will have a backup copy of your website content all the time. With this configuration your information will always be safe since it will be available on multiple disk drives.