M.2 NVME in U.2 Case not recognized via OCuLink

TrueNAS General
1

Hi,

we got M.2 NVMEs in a 2,5" SFF-8639 NVMe U.2 SSD-Adapter which is connected to a Supermicro BPN-SAS3-815TQ-N4 Hybrid Backplane. The Backplane is connected to the MB with a MCIO 8i SFF-TA-1016 to 2 x OCulink 4i SFF-8611. The Backplane powers on and seems to recognize connected drives but they dont show up in bios nor TrueNAS.

I read that some people got problems with cables becaus the pinning wasnt right. Anybody ever had this issue or similar?

BR

2

Yeah, the state of PCIe cabling is a mess. U.3/Tri-Mode, in addition to being terrible, further contaminated the rest of us with incompatible cables, apparently.

I’d recommend trying whatever cable Supermicro recommends.

2 Likes
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And it is getting worse:

Reminds me of;

1 Like
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Well, there are only three sizes (E1.S, E1.L and E3.S), with heatsinks in various thicknesses, all with the same connector and not trying to accomodate SAS/SATA alongside NVMe, so EDSFF is arguably an improvement over U.3.

5

12VHPWR anyone? That’s seriously on :fire: recently!