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if it is the case with the proprietary cables, which one would it be for 2x slimsas x4 on the backplane side of things? I had this board a couple of years ago with another chassis and another backplane (8x SAS/SATA and 4x NVMe) and it worked with sata drives.

Thx, I'll check with support

not to sure what you are pointing out with that link...these cables won't work, as I have a different backplane

so the broadcom driver does to its thing and the board isn't? I am running this on the latest version of truenas scale

thx, but my cable is slimsas x8 to 2x slimsas x4 and there is no pin. I had this board (not this one) in the past, and i never had to select anything...since its a hybrid port that should "auto sense" what is connected. The broadcom hab has no issues...what am i missing here?

I searched the manual and couldn't find anything in that regard https://www.supermicro.com/manuals/motherboard/EPYC7000/MNL-2220.pdf

Hello Guys! I am using a H12SSW-NT Board with a BPN-SAS3-LA26A-N12 backplane. My 4 NVMe drives work fine on slimsas x8 ports, but my SATA Disks don't get detected. They are connected to SATA0-7 Slimsas x8 Port on the Board to 2x Slimsas x4 on the backplane. I already tried two different cables...

@hmw: This chassis: CSE-826BAC4-R920LPB

Thanks for pointing this out. I did the crosscheck today and interestingly any other cable then the original supermicro cable is also not working on the HBA...thats weird. I am running out of ideas what cable to buy. And where the heck is the difference in those cables?

Hi Guys, I got this Board a few days ago and can't get the slimsas 8i ports to work. I have a supermicro chassis with nvme backplane (sff-8643 mini sas hd connectors) and the drives are not recognized. I order some chinese slimsas 8i to 2x mini sas hd, as they were the only cables I could find...

In case anyone is interested: For SAS Disks you can use the following (under Linux): sginfo -XRt 0x19 /dev/sda 0 2000 2000 0 = LED ON 1 = LED OFF Worked like a charm and the change is persistent as well.

Ok, thanks. If anybody knows I would appreciate it.

Thanks, interesting stuff in there but I couldn't find out if the LED behaviour can be changed though.

Hi! I am currently using a Supermicro 836BA-R920B Chassis which contains a 16 Port direct attach SATA/SAS Backplane. As HBA I am using a Microsemi HBA 1100-16i. All my drives (16x SAS) show no activity ( I mean the LEDs from the drive trays). I read about SGPIO Cables but I am still unsure...

I am in a similar situation. I "accidentally" flashed the Rome Bios and actually have a naples CPU installed. Now Board won't post (QCODE 00). I cannot revert to earlier BIOS because of the above mentioned Baseboard ID mismatch. Any ideas? Thanks!

I attached both dmesg outputs to the Jira Ticket.

Yes will do!

@KarelG: Yes, you are right. The issue I am facing with posting the dmesg output from TrueNAS nightly is that my NICs don't work in that version so I cannot copy and paste the output. A bit of a dilemma.

I would love to have that ISO to simply flash the cards to ETH!

Here is the Jira Ticket: [NAS-105542] FreeNAS 11.3-U1 - NVMe devices do not show up on AMD "Rome" Platform - iX - Bug Tracker (Jira)