IBM Internal Storage

Options for IBM Storage and POWER9

Almost three decades ago, back in 1997, IBM announced the flagship 9337 Disk Array Subsystem, a rack-mount disk unit that offers 1,084 MB to 33.55 GB of DASD for the AS/400 9406 Models B, D, E, and F as well as AS/400 Advanced System Model.  Back in the early ’80s, I engaged in a benchmark of the 9337 Disk Subsystem on an enterprise AS/400 against the EMC Symmetric system in Rochester, Minnesota.  I also presented RAID technology at a local user group meeting, explaining how to protect the data on the 9337 storage for the AS/400 with RAID 5 technology.

We have come a long way in storage for the Power System. In addition to internal hard disk drives (HDDs), there are Solid State Drives (SSDs), Non-Volatile Memory express (NVMe) drives, and the external IBM FlashSystems with all NVMe storage option. Gone are the days when AS/400 internal storage was usually the first choice in achieving the best performance. This blog discusses various IBM storage options for POWER9 and highlights the cost difference of deploying different storage options on a FlashSystem fiber attached to a POWER9.…

Costs of IBM i Storage Beyond the CEC: Expansion Drawers vs. V5030E SAN

IBM i Storage by the Numbers: Internal vs External SSD

I wrote an article on LinkedIn called “Shocking… IBM i Cost of Storage beyond the CEC: EXP-24S or V3700 SAN?” back in 2016 that sparked many conversations on what place external storage has in the IBM i hardware stack.  As a result of the popularity of my previous article, big innovation in the storage market, changes in storage costs, and a much more open IBM i infrastructure stack, it seemed like a really good time to go through the exercise again.

I don’t think it’s my place to sell you on whether internal or external storage is better.  Honestly, I believe there is a strong case to be made for both, depending on the customer situation.  With that being said I think it’s important I share my experience and knowledge, so you have what you need to make an informed decision for the businesses you serve.

For IBM i clients, typically there are a few reasons why they start to ponder a move to external storage:…