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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear List,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are configuring DRBD for the first time using the DRBD manual. We are planning to setup DRBD on our mail server running on RHEL 6.1 (64 bit), with the sole objective to replicate the mail store and mail queue from our data center to the DR site. Both the sites are connected with giga bit captive OF network.<o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal>We have installed the following drbd rpm that was built from the source drbd-8.4.3.tar.gz using rpmbuild :-<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>drbd-heartbeat-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-xen-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-km-debuginfo-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-udev-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-pacemaker-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-debuginfo-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-utils-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-km-2.6.32_131.0.15.el6.x86_64-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal>drbd-bash-completion-8.4.3-2.el6.x86_64<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We intend to keep the meta data to a separate partition though the manual talks about keeping it internal. We are trying to do this because as per our understanding the meta data sits on a raw partition. But the data that we would be replicating has to be in an EXT3 partition. Kindly guide us in case we are going wrong here.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We have created a partition using fdisk and have not formatted the same with any file system. Then we have issued the command <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>drbdadm create-md r0<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>on both the nodes. This step went through without any problem. After that we issued to the command<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>drbdadm up r0<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>But this command generates the following error at both the nodes.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[root@drbdtest1 ~]# drbdadm up r0<o:p></o:p></p><p class=MsoNormal>1: Failure: (104) Can not open backing device.<o:p></o:p></p><p class=MsoNormal>Command 'drbdsetup attach 1 /dev/sda3 /dev/sda6 flexible' terminated with exit code 10<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The resource file we are using are as follows:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>resource r0 {<o:p></o:p></p><p class=MsoNormal> on drbdtest1.cesc.co.in {<o:p></o:p></p><p class=MsoNormal> device /dev/drbd1;<o:p></o:p></p><p class=MsoNormal> disk /dev/sda3;<o:p></o:p></p><p class=MsoNormal> address 10.50.81.252:7789;<o:p></o:p></p><p class=MsoNormal> meta-disk /dev/sda6;<o:p></o:p></p><p class=MsoNormal> }<o:p></o:p></p><p class=MsoNormal> on drbdtest2.cesc.co.in {<o:p></o:p></p><p class=MsoNormal> device /dev/drbd1;<o:p></o:p></p><p class=MsoNormal> disk /dev/sda3;<o:p></o:p></p><p class=MsoNormal> address 10.50.81.253:7789;<o:p></o:p></p><p class=MsoNormal> meta-disk /dev/sda6;<o:p></o:p></p><p class=MsoNormal> }<o:p></o:p></p><p class=MsoNormal>}<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kindly guide us.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>With regards,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Goutam<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>