Supermicro SC825TQ + LSI 9271-8i + strange SGPIO problem

[Dennis]

Hello,

I have a strange problem with a new server.
Everything is working normal, but SGPIO is not working correctly!

With one sideband header connected the corresponding red fault/locate LEDs work as expected.
As soon as both sideband cables are connected the red LEDs don't work at all.


The setup is:

Supermicro SC825TQ (8-bay chassis)
LSI 9271-8i controller
2x CBL-0343L-01 (multilane breakout cable SFF8087 -> 4 SATA + SGPIO)
8x WDC 4TB SATA

1st multilane connector of LSI is connected to lower row of backplane (ports 0-3) and lower Sideband#1 header.
2nd multilane connector of LSI is connected to upper row of backplane (ports 4-7) and upper Sideband#2 header.
Jumpers on backplane are set for SGPIO mode as described in manual.


All drives are detected correctly and in the right order.
I'm testing the red LEDs with the "locate" function of the LSI controller.

Example:
- start locate on drive 0
- nothing happens (no red LED blinking)
- when I remove Sideband#2 connector: drive 0 starts to blink red as it should!
- reconnect Sideband#2: drive 0 stops to blink red!

- start locate on drive 7
- again nothing happens (no red LED blinking)
- then I remove Sideband#1 connector: drive 7 blinking!!
- reconnect Sideband#1: drive 7 stops blinking again!


So each row with its corresponding sideband works for itself.
But the 2 sidebands together seem to break both!


Now I've run out of ideas...

Did anyone get across such a problem?
Does anyone have a working SGPIO setup with this controller and chassis?


--
Regards
Dennis

 

[Christw]

Since this post is more than one year old, I guess there is no interest for the creator in this problem anymore. However I experienced this issue myself today too and maybe somebody else except the creator might be interested in the solution:

I'm also using the Supermicro SC825TQ and for me the issue was caused by jumpers that were set wrong. To be specific it was Jumper JP40 and JP41 which I put horizontal instead of vertical. They are next to each other so instead of JP40 Pin 1-2 connected and JP41 Pin 1-2 connected I had JP40-Pin1 + JP41-Pin1 connected and JP40-Pin2 + JP41-Pin2 connected.