[OmniOS-discuss] PCI-e x8 only running x4

[Richard Elling]

> On Jan 23, 2017, at 5:17 PM, Michael Rasmussen <mir at miras.org> wrote:
> 
> On Mon, 23 Jan 2017 19:27:51 -0500
> Dale Ghent <daleg at omniti.com> wrote:
> 
>> 
>> Check your BIOS settings for the slots, they might be limited there. I also note that this motherboard model has two physical x8 PCIe slots but one of them is wired for 4 lanes only. Is your card in that slot? Something not linking up like this is likely to be more of a hardware configuration issue.
>> 
> Doesn't this proof an x8 slot? LnkCap: Port #0, Speed 2.5GT/s, Width x8
> I was aware of that one of the x8 slot was actually a x4 slot so I am
> quite certain I have picked the right one.
> 
> It couldn't be as simple as since there is no disks connected to the
> second channel so the 4 lanes for the second channel is not active?
> 
>> Also keep in mind that the 1068E card is quite old and its driver support in OmniOS/illumos is still the closed-source mpt driver binary, so there is not much room here.
>> 
> I am aware of that and an upgrade to a 2x08 is on the todo list.

This card can’t saturate a modern x4, so you gain nothing going to x8.
 — richard

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