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Choose the right RAID set for your HP ProLiant Server



HP Smart Array RAID controllers support a large variety or RAID sets which can be configured using the HP Array Configuration Utility also known as ACU. 


Choosing the best RAID set requires an understanding of how the configuration impacts your fault tolerance, available capacity, and write performance.





Scott reviews the different application needs of today’s business environments.  Also, the HP Product portfolio is presented for different offerings to meet performance and capacity requirements of servers, Hard drives, controllers, HBAs, as well as IO accelerators.


HP Smart Array controllers support many different RAID sets that allow you to pick the optimal configuration for your storage needs. 


Basic RAID 10 delivers the best write performance, however RAID 10 ADM provides the highest fault tolerance, and RAID 5 offers the largest available capacity.


Please see the following for more information about HP ProLiant and HP Smart Array RAID controllers:

ACU Documentation

Configuring Arrays on Hp Smart Array Controllers Reference Guide


Please provide us with feedback if you have questions or found this video helpful.

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Keep in mind that latent disk errors are one of the biggest problems with RAID technology.

If you are rebuilding a RAID, Unrecoverable Read Error (URE) can stop a RAID rebuild in its track, essentially making the entire RAID volume unusable.


Typical ranges for hard drives are around 1 x 10^14 bits which means that 1 out of every 10^14 bits cannot be read. This means if you have 12TBs or 12x 1TB drives your probability of encountering a URE is one (i.e. it’s going to happen). If you have 2TB drives, then all you need is 6x 2TB drives and you will encounter a URE. If you have a RAID-5 group that has seven 2TB drives and one drive fails, the RAID rebuild has to read all of the remaining disks (all six of them). At that point you are almost guaranteed that during the RAID-5 rebuild, you will hit a URE and the RAID rebuild will fail. This means you have lost all of your data.


Hi Ron Sunden,

Thanks for your comment. For ProLiant Gen9, HP has designed Smart Storage for customers to have a wide range of storage options from the basic storage of the B140i to the higher performance scale out capabilities of the Smart SAS HBA controllers. HP Smart Array Controllers for Gen9 deliver the best performance, scalability, and resiliency through advanced Smart Storage features such as HP SmartCache, Rapid Rebuild, and advanced RAID modes.


In addition, HP endeavors to simplify the Smart Storage management experience as well. The Smart SAS HBA controllers and the HP Smart Array controllers for Gen9 use the same device drivers and the HP Smart Storage Administrator is now the single point of control for all Smart Storage management—including array configuration, storage maintenance, and storage monitoring and diagnosis.


As data storage and accessibility requirements grow, storage solutions need to meet a variety of needs and HP Smart Storage solutions for ProLiant Gen9 improve your storage utilization and performance while delivering the scalability, reliability, and accessibility required, while also helping deal with data privacy challenges.

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