RAID in Shared Web Hosting
All of the content that you upload to your new shared web hosting account will be saved on fast SSD drives that function in RAID-Z. This setup is built to employ the ZFS file system which runs on our cloud web hosting platform and it adds another level of security for your content in addition to the real-time checksum verification which 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 data is recorded on it, an additional bit is added, so if any drive stops functioning for some reason, the integrity of the data can be verified by recalculating its bits based on what is saved on the production drives and on the parity one. With RAID-Z, the operation of our system will never be interrupted and it'll continue working smoothly until the faulty drive is replaced and the data is synchronized on it.
RAID in VPS Servers
The SSD drives that we use on the physical machines where we set up VPS servers work in RAID to make sure that any content which you upload will be available and intact all of the time. At least a single drive is used for parity - one bit of information is added to any data cloned on it. In the event that a main drive breaks down, it is replaced and the data that will be duplicated on it is calculated between the other drives and the parity one. That’s done to ensure that the required information is copied and that no file is corrupted because the new drive will be incorporated into the RAID afterwards. In addition, we use hard drives functioning in RAID on the backup servers, so if you add this upgrade to your VPS plan, you will use an even more reliable hosting service because your content will be available on multiple drives irrespective of any type of unforeseen hardware failure.