PXIe-5186 output to HDD-8265 RAID

[thu^^]

I've got a PXIe-1075 chassis with a PXIe-8133 controller and PXIe-5186 digitizer and HDD-8265 RAID connected to it via 8262 PCIe link.

Basically, I need to stream the digitizer output to the RAID.

In LabVIEW one can use NI-SCOPE to acquire the data from digitizer, and simply write it to disk. RAID is configured to look like a normal disk to LabVIEW, the only difference being a much higher write speed. The problem with this is that data comes through the controller. In my understanding, there must be a way to route digitizer's sample output directly to RAID, to avoid loading processor, which is a potential bottleneck.

Any advice on how to do it?

P.S. I also have a PXIe-7966R Virtex5 FPGA board in my system, and it would be interesting to route samples to RAID through FPGA board, and do some signal processing while at it. Is it possible?

[warEagle12 · Accepted solution]

Hello,

I have been looking in to your question and found a few links that may be helpful:

- This article talks about a Direct-to-disk controller that would allow for data to be streamed directly from the device memory onboard your instrument and across the PCI/PCIe bus, as well as some other infromation about device memory considerations and streaming architectures: http://www.ni.com/white-paper/3221/en/

- Here is another helpful article that discusses the different RAID configurations that you can use as well as the different Benchmarks for various drivers: http://www.ni.com/white-paper/5897/en/

- In my searches, I also found this forum post that is somewhat related to your question. He is looking in to using peer to peer streaming to transfer data from a PXIe-7966R to a NI-8265, though that RAID is not Peer to Peer supported: http://forums.ni.com/t5/LabVIEW/peer-to-peer-streaming/td-p/1935839

Thanks!

[thu^^]

Aha, so in my configuration p2p streaming is not possible, since both digitizer and RAID are not p2p-enabled. The only option is to stream through the controller. Ok, thank you.