What is RAID 50

RAID 50 is a sort of RAID configuration that’s made up of two RAID levels, RAID 5 and RAID 0 and is created to supply the highest levels of performance and data protection.

It utilises block-level striping with distributed parity beyond several RAID 5 arrays. This implies that data is transmitted around numerous drives, as well parity information is also spread across the drives. This produces repetition in case of a drive failure, because the parity knowledge can be used to rebuild the data on the unsuccessful drive.

Additionally, RAID 50 is a exceptional choice for applications that require top performance and data redundancy, especially video editing or database applications. On the other hand, it’s mandatory to have a minimum of six drives to implement, making it tough to manage. In addition, the production improvement supplied by RAID 50 is poor compared to the production improvement supplied by RAID 0, as most of the bandwidth is used for parity knowledge.

In conclusion, RAID 50 is a sort of RAID configuration that merges the striping of RAID 0 with the over abundance of RA. As well as that, RAID 50 produces an excellent balance between performance and data redundancy. It’s a better choice for applications that require both. However, it’s important to carefully consider the total amount of drives required and the management overhead prior to implementing RAID 50.


Creating a RAID 50 Storage Pool in QNAP

Go to Storage Manager > Storage > Storage Space.

Perform one of the following actions.

NAS State


No volumes or storage pools

Click New Storage Pool.

One or more storage pools.

Click Create, and then select New Storage Pool.


Click Create > New Storage Pool.

Specify a pool name. Select an expansion unit from the Enclosure Unit list. 

Create the first sub-group. Select disks. All data on the selected disks will be deleted.

Select a RAID type of RAID 50 or RAID 60. 

Create the second sub-group. Select disks. For the best performance, the number of disks should be the same as the first sub-group. All the data on the disks will be deleted

Optional: Configure SSD over-provisioning.



SSD over-provisioning

QES reserves the specified percentage of space on each SSD to increase random write performance and to extend SSD lifespan.

Pool over-provisioning

QES reserves the specified percentage of space in the storage pool to ensure consistent random write performance when the pool is nearly full.

For best results, set pool over-provisioning to 20% or higher.

Enable Write Coalescing

Write Coalescing optimizes the pool for SSD storage, which improves pool random write performance and extends SSD lifespan.

You cannot modify this setting after storage pool creation.


Verify the storage pool information.

Click Create. A confirmation message appears.

Click OK. QES creates the storage pool and then displays the information on the Storage Space screen.

Add more RAID 5 or RAID 6 sub-groups to the storage pool. You can add additional using the Expand Storage Pool wizard. 


Further reading

Fixing a degraded RAID

DELL PowerEdge multiple drive failure

Seagate NAS rescue & repair