RAID, or Redundant Array of Independent Disks, is a technology of saving data on multiple hard drives that work together as one single logical unit. The drives could be physical or logical i.e. in the aforementioned case a single drive is divided into separate ones using virtualization software. In any case, exactly the same information is stored on all the drives and the main advantage of employing such a setup is that in case a drive stops working, the data will remain available on the other ones. Using a RAID also boosts the overall performance since the input and output operations will be spread among a couple of drives. There are several types of RAID depending on how many drives are used, whether writing is performed on all drives in real time or just on a single one, and how the data is synchronized between the hard drives - whether it's 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 and the performance between the different RAID types may vary.
RAID in Website Hosting
All the content that you upload to your new website hosting account will be placed on fast SSD drives which work in RAID-Z. This configuration is built to use the ZFS file system which runs on our cloud hosting platform and it adds another 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 information is saved on a couple of disks and at least 1 is a parity disk - whenever data is written on it, an additional bit is added, so if any drive stops functioning for whatever reason, the integrity of the data 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 functioning of our system won't be interrupted and it'll continue functioning flawlessly until the faulty drive is changed and the info is synchronized on it.
RAID in Semi-dedicated Servers
The RAID type that we use for the cloud Internet hosting platform where your semi-dedicated server account will be created is known as RAID-Z. What is different about it is that at least 1 of the disks is used as a parity drive. Put simply, whenever any data is cloned on this special drive, one more bit is added to it and in case a defective disk is replaced, the info which will be duplicated on it is a mix of the data on the other disk drives in the RAID and that on the parity one. It's done this way to make sure that your info is intact. Throughout this process, your websites will be functioning normally as RAID-Z enables a whole drive to fail without service interruptions and it simply works by using one of the remaining ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to warrant that no data will get silently corrupted on our servers, you won't ever have to worry about the integrity of your files.
RAID in VPS Servers
All VPS server accounts which we provide are created on physical servers which use SSD drives working in RAID. At least 1 drive is intended for parity - one extra bit is included in the info cloned on it and if a main disk fails, this bit makes it simpler to recalculate the bits of the files on the failed drive so that the accurate data is restored on the new drive included in the RAID. Meanwhile, your Internet sites will remain online since all the information will still load from at least one other hard disk. In case you add regular backups to your VPS plan, a copy of your data will be kept on standard disk drives that also function in RAID since we would like to make sure that any site content you upload will be risk-free at all times. Using multiple drives in RAID for all the main and backup servers enables us to offer fast and reliable web hosting service.