Supermicro board shows only 6 out of 7 disks connected

[asimov-solensan]

Hello,

I have been using Supermicro X10SLL-F for some years. I installed a PCIE sata controller for the boot disk in order to use all the 6 built-in ports, a ASM1061 based card as someone suggested (not for ZRAID, just a boot drive).

Therefor I have got 6 disks connected on the built-in ports and a seventh one in the additional PCIE card.

The problem is when I boot and access the BIOS I can only see 6 disks. One of the disks in built in ports is not listed. But as soon as I disconnect a disk (it doesn't mater which one), and check again the BIOS, I have again 6 disks and the lost disk is present.

Of course in truenas I get the same result, I can only see 6 disks. And it does not seem a problem with the pcie card, I'm running truenas right now from that disk. Somehow it seems a BIOS limitation.

Does anyone know what can be the problem?

 

[asimov-solensan]

So I have been rotating cables and found out that P0 in the motherboard was the one appearing and disappearing. It is not that board detects 6 disks but P0 randomly disappearing.

It may be that cable is damaged or maybe connector a bit loose. Because after all that connect/disconnect I got all 7 disks connected and working.

But I cannot be sure.