Redundant Array of Independent Disks, or RAID, is a way of keeping content on multiple hard disk drives simultaneously. 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 the fact that they all perform as a single unit where data is saved. The biggest advantage of using a RAID is redundancy as the data on all drives will be identical all the time, so even in case some drive fails for whatever reason, the information will still be present on the other drives. The overall performance will also improve because the reading and writing processes can be split between different drives, so a single one will never be overloaded. There are different sorts of RAIDs where the functionality and fault tolerance may differ according to the exact setup - whether data is written on all drives in real time or it's written on a single drive and after that mirrored on another, what number of drives are used for the RAID, and many others.

RAID in Cloud Hosting

The hard drives that we employ for storage with our revolutionary cloud web hosting platform are not the standard HDDs, but high-speed solid-state drives (SSD). They operate in RAID-Z - a special setup developed for the ZFS file system that we employ. All the content that you add to your cloud hosting account will be stored on multiple hard drives and at least one will be employed as a parity disk. This is a special drive where a further bit is added to any content copied on it. If a disk in the RAID stops functioning, it will be replaced without service disruptions and the data will be recovered on the new drive by recalculating its bits using the data on the parity disk along with that on the other disks. This is done to ensure the integrity of the info and together with the real-time checksum authentication that the ZFS file system runs on all drives, you won't ever need to worry about losing any info no matter what.

RAID in Semi-dedicated Servers

The SSD drives which are used for holding any site content uploaded to the semi-dedicated server accounts that we offer operate in RAID-Z. This is a special setup where one or more hard drives are used for parity i.e. the system will include an extra bit to any data duplicated on such a disk drive. If a disk fails and is replaced with another one, what data will be duplicated on the latter shall be a combination calculated between the data on the remaining disks and that on the parity one. This is done to make sure that the data on the new drive will be accurate. Throughout the procedure, the RAID will continue operating adequately and the faulty drive will not impact the proper operation of your sites in any way. Using SSDs in RAID-Z is an outstanding addition to the ZFS file system which runs on our cutting-edge cloud platform in terms of preserving the integrity of your files since ZFS uses specific digital identifiers identified as checksums so as to prevent silent data corruption.