Supermicro AOC-SLG3-2M2 dual M.2 card only identifies one drive

[Craig Leres]

I picked up one of these and two intel 760p M.2 drives for use with a
Supermicro X10SRA-F motherboard under 11.2-RELEASE-p3. The system only
identifies drive that is mounted in the top slot. I believe this pci-e
x8 card mostly just wires the (m-key) M.2 connectors pins to the pci
slot pins. It looks like the top drive goes to the first 4 pci-e lanes
and the bottom slot the next 4 pci-e lanes.

I suspect the driver is not even looking for the nvme that is connected
to the second set of lanes. Can anyone tell me what it takes to support
this configuration?

Craig

[m***@fuckner.net]

Hi,
Please have a look in the bios to Change the Slot from x8 to x4+x4
Michael!
Sent from MailDroid

-----Original Message-----
From: Craig Leres <***@freebsd.org>
To: FreeBSD Hackers <freebsd-***@freebsd.org>
Sent: Mi., 26 Sep. 2018 19:40
Subject: Supermicro AOC-SLG3-2M2 dual M.2 card only identifies one drive

I picked up one of these and two intel 760p M.2 drives for use with a
Supermicro X10SRA-F motherboard under 11.2-RELEASE-p3. The system only
identifies drive that is mounted in the top slot. I believe this pci-e
x8 card mostly just wires the (m-key) M.2 connectors pins to the pci
slot pins. It looks like the top drive goes to the first 4 pci-e lanes
and the bottom slot the next 4 pci-e lanes.

I suspect the driver is not even looking for the nvme that is connected
to the second set of lanes. Can anyone tell me what it takes to support
this configuration?

Craig
_______________________________________________
freebsd-***@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-hackers
To unsubscribe, send any mail to "freebsd-hackers-***@freebsd.org"

[Craig Leres]

Post by m***@fuckner.net
Please have a look in the bios to Change the Slot from x8 to x4+x4

Perfect, thanks!

But also I see there is a linux driver available for download from the
Supermicro website. Is it possible to make driver changes and talk to
both nvme disks without bifurcating a pci-e slot?

For future reference the knob is under:

Advanced -> PCIe/PCI/PnP -> CPU SLOT{1,6} PCI-e ... bifurcation

I had to do testing with a different motherboard (X10DRW-i) and even
after updating the bios wasn't able to find the magic option to boot
from a nvme. The manual says:

change the Device Option Rom Configure "UEFI mode" from Legacy

but this didn't give me any nvme drives to configure to boot from.

Craig