<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Carlos,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>We are working on this issue and will keep you informed.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Xing<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><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"'> Carlos Alvarez [mailto:cbalvarez@gmail.com] <br><b>Sent:</b> Monday, November 18, 2013 1:19 PM<br><b>To:</b> openstack@lists.openstack.org<br><b>Subject:</b> [Openstack] multipath - EMC vs NetApp<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi All.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I recently added a EMC V-Max storage system, and realized the multipath is not working. The device is called /dev/mapper/XXXX but when I see the multipath -ll output, I see just one path. It is working fine with a NetApp 3250. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Looking into differences, I see the output of the iscsiadm discovery differs:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Netapp output:<o:p></o:p></p></div><div><div><p class=MsoNormal>root@grizzly-dev04:~# iscsiadm -m discovery -t sendtargets -p 10.33.5.10<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://10.33.5.10:3260">10.33.5.10:3260</a>,1030 iqn.1992-08.com.netapp:sn.0e3c22d9f2ea11e2a2f2123478563412:vs.10<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://10.33.5.11:3260">10.33.5.11:3260</a>,1031 iqn.1992-08.com.netapp:sn.0e3c22d9f2ea11e2a2f2123478563412:vs.10<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Emc output:<o:p></o:p></p></div><div><p class=MsoNormal>root@grizzly-dev04:~# iscsiadm -m discovery -t sendtargets -p 10.33.5.25<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://10.33.5.25:3260">10.33.5.25:3260</a>,1 iqn.1992-04.com.emc:50000973f00bcd44<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Looking into the code, the former is clearly what the connect_volume method is expecting: a single ip which returns both path. I reported it to EMC and the answer is that it works with netapp because the 3250 has a feature EMC lacks (called multipath groups). <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is anybody using multipath with a V-Max?. It should work or EMC is not supported?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks!<o:p></o:p></p></div><div><p class=MsoNormal>Carlos<o:p></o:p></p></div></div></div></body></html>