RAID, or Redundant Array of Independent Disks, is a technology for saving data on a number hard drives which work together as one single logical unit. The drives can be physical or logical i.e. in the aforementioned case one drive is split into separate ones via virtualization software. In either case, exactly the same information is stored on all drives and the main benefit of employing this kind of a setup is that in the event that a drive fails, the data will remain available on the other ones. Using a RAID also improves 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 hard drives are used, whether writing is done on all the drives in real time or just on one, and how the information is synced between the hard drives - whether it is recorded in blocks on one drive after another or it is mirrored from one on the others. All these factors indicate that the error tolerance and the performance between the different RAID types could differ.

RAID in Hosting

The hard drives that we employ for storage with our outstanding cloud hosting platform are not the traditional HDDs, but super fast solid-state drives (SSD). They function in RAID-Z - a special setup designed for the ZFS file system that we use. All the content that you upload to your hosting account will be saved on multiple drives and at least one will be used as a parity disk. This is a specific drive where a further bit is included to any content copied on it. If a disk in the RAID stops functioning, it will be replaced with no service interruptions and the info will be recovered on the new drive by recalculating its bits using the data on the parity disk along with that on the remaining disks. This is done to ensure the integrity of the information and along with the real-time checksum authentication which the ZFS file system performs on all drives, you won't ever have to concern yourself with losing any data no matter what.

RAID in Semi-dedicated Servers

If you host your websites inside a semi-dedicated server account from our firm, all the content you upload will be held on SSD drives which work in RAID-Z. With this type of RAID, at least 1 of the disks is employed for parity - when data is synchronized between the drives, an additional bit is included in it on the parity one. The purpose behind this is to ensure the integrity of the data which is copied to a new drive if one of the disks in the RAID stops working since the website content being copied on the new disk is recalculated from the data on the standard disk drives and on the parity one. An additional advantage of RAID-Z is that even in the event that a hard drive stops functioning, the system can easily switch to another one quickly without service disturbances of any sort. RAID-Z adds an extra level of safety for the content which you upload on our cloud Internet hosting platform together with the ZFS file system which uses unique checksums in order to verify the integrity of each file.

RAID in VPS Servers

The SSD drives which we use on the physical machines where we set up VPS servers work in RAID to make sure that any content that you upload will be available and intact all the time. At least 1 drive is employed for parity - one bit of information is added to any data copied on it. If a main drive stops working, it is changed and the info which will be duplicated on it is calculated between the remaining drives and the parity one. It's done this way to ensure that the needed info is copied and that not a single file is corrupted because the new drive will be included in the RAID afterwards. In addition, we use hard drives operating in RAID on the backup servers, so in the event that you add this upgrade to your VPS package, you shall use an even more reliable web hosting service because your content will be available on multiple drives irrespective of any unexpected hardware malfunction.