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<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I use RHEL, it works
very fine. Thanks.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I have another
question.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I tried with a normal
server (without RAID controller) to simulate the storage and it cannot be
recognized by multipath.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Does it mean that I can’t
use a normal server (without RAID controller) to simulate the storage?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Since the WWID used
in multipath seems to be generated by the RAID controller.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thanks again.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'>PN<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Scott Weitzenkamp (sweitzen)
[mailto:sweitzen@cisco.com] <br>
<b>Sent:</b> Tuesday, June 26, 2007 11:58 PM<br>
<b>To:</b> PN Lai; general@lists.openfabrics.org; Scott Weitzenkamp (sweitzen)<br>
<b>Subject:</b> RE: [ofa-general] SRP Failover<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>You need to configure Device Mapper Multipath or some other
multipathing software to get HA. What OS are you running?</span><span
lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Steps for RHEL are:</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>1) Edit /etc/multipath.conf and comment out devnode_blacklist
(RHEL4) or blacklist (RHEL5) entry.</span><span lang=EN-US style='font-family:
"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>2) Run "chkconfig multipathd on".</span><span lang=EN-US
style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>3) Reboot.</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>4) After reboot, /dev/mapper should be populated with mutipath
block device entries.</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>5) You can run "multipath -l" to view the multipath
status.</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Steps for SLES10 are similar:</span><span lang=EN-US
style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>1) Run "chkconfig boot.multipath on".</span><span
lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>2) Run "chkconfig multipathd on".</span><span lang=EN-US
style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>3) Reboot.</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>4) After reboot, /dev/mapper should be populated with mutipath
block device entries.</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>5) You can run "multipath -l" to view the multipath
status.</span><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>You use the /dev/mapper block devices, not /dev/sd* block devices.</span><span
lang=EN-US style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Scott Weitzenkamp<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>SQA and Release Manager<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Server Virtualization Business Unit<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Cisco Systems<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<p class=MsoNormal><span lang=EN-US style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US
style='font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
general-bounces@lists.openfabrics.org
[mailto:general-bounces@lists.openfabrics.org] <b>On Behalf Of </b>PN Lai<br>
<b>Sent:</b> Tuesday, June 26, 2007 2:48 AM<br>
<b>To:</b> general@lists.openfabrics.org<br>
<b>Subject:</b> [ofa-general] SRP Failover</span><span lang=EN-US
style='font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Hi all,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I’m testing the SRP HA functions, but
I have some questions.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I use 2 IB cables to connect the initiator
and 1 IB cables to connect to the storage.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I installed the OFED-1.2, enable the
“SRP_LOAD=yes” and “SRPHA_ENABLE=yes” in openib.conf.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>After reboot, it discovers 2 targets
/dev/sdbX and /dev/sdcX. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>However, I check the
/var/log/srp_daemon.log, it shows:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>….<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>26/05/07 17:42:57 : bad MAD status (110)
from lid 257<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>26/05/07 17:43:30 : No response to inform
info registration<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>26/05/07 17:43:30 : Fail to register to
traps, maybe there is no opensm running on fabric<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>….<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>But the opensm is running in both machines.
I don’t know whether it is normal, or should it only discover a single
target?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Now, my question is that if I mount the
/dev/sdbX and write data to it, and then remove 1 of the initiator cable, how
the /dev/sdcX will replace the /dev/sdbX so that I can continue to write the
data?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Do I need to configure some extra files?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks for reply.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>PN<o:p></o:p></span></p>
</blockquote>
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