Redundant Array of Independent Disks, or RAID, is a way of storing content on multiple hard disk drives at the same time. A RAID might be software or hardware based on the hard drives which are used - physical or logical ones, however what is common between them is that they all function as one single unit where data is saved. The main advantage of using a RAID is redundancy because the information on all drives is the same all of the time, so even in case some drive fails for some reason, the information will still be present on the rest of the drives. The overall performance is also enhanced since the reading and writing processes can be split between multiple drives, so a single one will never be overloaded. There are different sorts of RAIDs where the capabilities and fault tolerance could differ according to the particular setup - whether your data is written on all of the drives real-time or it's written on one drive and after that mirrored on another, what number of drives are used for the RAID, and so on.

RAID in Shared Website Hosting

The drives that we employ for storage with our innovative cloud Internet hosting platform are not the traditional HDDs, but fast solid-state drives (SSD). They work in RAID-Z - a special setup developed for the ZFS file system which we employ. Any content that you add to your shared website hosting account will be stored on multiple drives and at least one shall be employed as a parity disk. This is a special drive where an extra bit is added to any content copied on it. If a disk in the RAID stops working, it'll be replaced without service disruptions and the data will be recovered on the new drive by recalculating its bits thanks to the data on the parity disk plus that on the other disks. This is done to guarantee the integrity of the info and along with the real-time checksum validation that the ZFS file system executes on all drives, you'll never need to worry about losing any data no matter what.

RAID in Semi-dedicated Servers

The SSD drives which are used for storing any content uploaded to the semi-dedicated server accounts which we provide work in RAID-Z. This is a special setup where one or more drives are used for parity i.e. the system will add an extra bit to any data duplicated on this kind of a disk drive. In case that a disk fails and is substituted with a new one, what info will be cloned on the latter will be a mix calculated between the data on the other disks and that on the parity one. This is done to guarantee that the information on the new drive shall be accurate. Throughout the process, the RAID will continue working adequately and the problematic drive won't have an impact on the proper operation of your sites at all. Using SSDs in RAID-Z is an amazing addition to the ZFS file system which runs on our state-of-the-art cloud platform with regards to preserving the integrity of your files as ZFS uses specific digital identifiers identified as checksums to avoid silent data corruption.

RAID in VPS Servers

The SSD drives which we use on the machines where we generate VPS servers work in RAID to ensure that any content that you upload will be available and intact all of the time. At least one drive is used for parity - one bit of data is added to any data copied on it. In the event that a main drive breaks down, it is replaced and the info that will be cloned on it is calculated between the rest of the drives and the parity one. It's done this way to ensure that the needed information is copied and that not a single file is corrupted since the new drive will be a part of the RAID afterwards. We also use hard disk drives working in RAID on the backup servers, so in case you add this upgrade to your VPS plan, you'll use an even more reliable hosting service because your content will be available on multiple drives regardless of any type of unforeseen hardware malfunction.