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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Slava,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>I am forwarding this to the arbitration committee as per the <a href="http://www.iol.unh.edu/services/testing/ofa/logoprogram/OFA-UNH-IOL_Logo_Program-v1.14.pdf">Logo Program Policy.</a> These requests will be reviewed and responded to by the committee even though they will certainly be reviewing this with Nick.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Thanks<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Rupert<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Yaroslav Pekelis [mailto:slava@mellanox.com] <br><b>Sent:</b> Friday, February 03, 2012 3:53 PM<br><b>To:</b> Nickolas Wood (ndv2@iol.unh.edu); Rupert Dance (rsdance@soft-forge.com)<br><b>Cc:</b> Amit Krig; Eyal Gutkind<br><b>Subject:</b> FW: Arbitration request for UNH failures.<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Nick,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would like to fill official arbitration request on two issues:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>First, link coming at SDR with Legacy Mellanox devices and ConnectX-3 based FDR cards. <o:p></o:p></p><p class=MsoNormal>Wrong rate was caused by simple configuration error that was injected into INI of those cards between debug and logo events. The error was fixed in later version and does not have any implication on the planned GA version of the FW images. The proper images were provided to UNH immediately after error was reported emphasizing the simplicity of the error and it resolution.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Second, link coming at DDR speed with Qlogic 12200. <o:p></o:p></p><p class=MsoNormal>For last two weeks I have done innumerous number of tests with 4 different Qlogic 12200 switches and different cables. <o:p></o:p></p><p class=MsoNormal>I did not test cables with more than 12DB attenuation loss – since this is the attenuation the Qlogic switch supports – I did not see a single link coming at other than QDR speed. <o:p></o:p></p><p class=MsoNormal>In addition, deep analyze of the logs coming from the failing link shows that QDR link negotiation was performed and then dismissed by the Spec negotiation algorithms as having a lot of errors. This leads me to conclusion that Qlogic switch used in the OFA cluster has been badly used and may have ports in bad shape. This would explain why we have 3 other links connected to SwitchX based devices MSX6036 and MSX6025 linked at proper QDR speed. This also explains why I have proper link speed when using switches I have in my lab.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thus, I would like to ask arbitration committee to approve retest the updated images for HCAs and redoing the testing of the link using cables with better signal integrity and try more ports on both switches and if possible another Qlogic switch.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Slava<o:p></o:p></p></div></body></html>