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If someone else is looking for information, I want to add my experience with 2 SX6036 switches and 100m MM OM4 with LC connectors. Cisco QSFP-40G-SR-BD - Switch identifies the modules, but could never get it to power the laser diodes. Spent hours and hours with modified firmware and...

:D I used to work at a hospital where we had a yearly site redundancy test. Its really nerve wracking to shut down an entire production site :eek:, but also a good way to find out mistakes like this one :D

I thought it would be a good idea to write a follow up If some one else finds this thread: The entire rack had been shut off for a couple of days. After powering everything back on, strange problems appeared immediately. The most serious being random lost connections to datastores on all hosts...

@kapone Thank you, I did as you said and yes it worked perfectly out of the box. The performance blew my mind! Compared to regular iSCSI it more then doubled my benchmark results! Sadly truenas decided that iSER should be a enterprise feature... I found a workaround that I hope will continue to...

RDMA and iSER is all new to me. I want to try it in my home lab, but I cant really find any good guides for it. I understand that I need to configure DCB on my switch that is a Mellanox SX6036 running PPC_M460EX 3.6.8012. Is there anyone here who can explain how to configure DCB on this switch?

You are absolutely correct, its me thinking one thing and typing another. My disks are SAS12 SSDs nothing else. I will edit my post.

@kapone @mattventura Thank you for taking your time to answer my questions. I have now ordered two SFF-8087 to SFF-8643 cables. I might not be able to get full performance from my 24 SSDs in striped mirror, but probably it will be more then enough for my needs.

Thanks, I suspected something like this. But that would also mean I will loose bandwidth, right? Another question, is a xxxx-24i overkill since I can only use 2 ports? Would a xxxx-8i do the job as well?

Im planning to build a TrueNAS server of my old HPE DL380 GEN8 25-SFF. I have 24 SAS12 SSDs and plan to pair these with a LSI 9305-24i HBA. From my understanding this backplane supports 25 SAS12 disks, but here is where I get confused. There are only two SFF-8087 ports on the backplane. How is...