3 Replies Latest reply on Dec 2, 2011 10:09 AM by tedk

    PCIe fallback

    darence

      Hello,

       

      Can you tell me if it is possible not to use Ethernet over eMAC in sccKit 1.4.0+ ? For a very specific experiment I would rather disable eMAC and use Ethernet over PCIe to talk to the cores from the MCPC. Is there a way to do it without too much hassle?

       

      Thanks!

        • 1. Re: PCIe fallback
          tedk

          You can disable eMAC with 1.4.0 (and you should because 1.4.0/eMAC results in bug known as vampire cores).

          1.4.1 with patch 1 is unstable ... do not use it ... we call this 1.4.1.1 although the splash screen still says 1.4.1

          1.4.1 with patch 2 ... call it 1.4.1.2 although the splash screen still says 1.4.1 ... do not disable eMAC ... the MCPC reboots when you load SCC Linux on the cores.

          1.4.1 with patch 3 ... call it 1.4.1.3 although the splash screen still says 1.4.1 ... do not disable eMAC ... the MCPC reboots when you load SCC Linux on the cores.

           

          1.3.0 does not have eMAC enabled and cannot have it so.

          • 2. Re: PCIe fallback
            darence

            We are running 1.4.1.3 (marc041). Does this mean that it is not possible to disable eMAC?

             

            Would it be possible to downgrade us to 1.4.0 and then disable it? How is it disabled at all? Thanks!

            • 3. Re: PCIe fallback
              tedk

              If with 1.4.1.3 you disable eMAC, the MCPC will panic. The system becomes unuseable.

               

              Disabling eMAC requires root privilege. As a summary ...

              On the MCPC, edit /etc/exports, /etc/network/interfaces, /opt/sccKit/systemSettings.ini, /etc/bind/*.zone, /etc/bind/named.*, /etc/ssh/ssh_conifg, /etc/hosts.

              We need to be careful to update the serial numbers in the zone files. We powercycle everything .. basically we want to restart bind and networking.

               

              Dropping to 1.4.0 would require the above as well. In addition 1.4.0 has a different SCC Linux.

               

              Message was edited by: Ted Kubaska .. typo