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<p><span style="font-size: 9pt;"><span style="font-family: verdana,geneva;"><span style="background-color: transparent;"><span style="color: #000000;"><span style="color: #000000;">hi all,<br /></span></span></span></span></span></p>
<p>we use<br />two Supermicro Server 8GB RAM, 2xQuadcore Xeon 5x <br />3ware 9550 Raid 5 with 6*320GB Seagate, <br />Network for DRBD between the two systems is a direct 10 GB connection (Intel 82598EB 10GbE AF Network Adapter) only for DRBD Sync <br />SLES 10 SP2, 2.6.16.60-0.39.3-xen #1 SMP x86_64 <br />DRDB 8.2.6 <br />Raid 5 > phy. Disk > LVM > DBBD > LVM > XEN > VBD <br />one lv on top of DRBD as OCFS2 for the DomUs</p>
<p>then we set for performance <br /># blockdev --setra 16384 /dev/sda (only change) <br /># echo 512 > /sys//block/sda/queue/nr_requests <br /># echo deadline > /sys/block/sda/queue/scheduler <br /># echo 20 > /proc/sys/vm/dirty_background_ratio <br /># echo 60 > /proc/sys/vm/dirty_ratio</p>
<p>node 1 with 2 aktiv DomU´s<br />node 2 reboot<br /><br />after reboot node 2, drbd was sync with node <br /># /etc/init.d/drbd status<br />0:drbd0 Connected Primary/Primary UpToDate/UpToDate C</p>
<p>but, the VG an the LV on top of drbd was vansihed<br />and on the node 1 the same??????????</p>
<p>then I was show the partitions on node 1<br /># df <br />/dev/sda2 / (mounted)<br />df: '/vm': Input/output error ???</p>
<p>but the DomU´s on node1 running and has mounted LV on top of drbd as xvd???</p>
<p>here my drbd.conf<br />.................................</p>
<p>global {<br /> usage-count yes;<br /> disable-ip-verification;<br />}<br /><br />common {<br /> syncer { rate 400M; al-extents 3389; }<br />}<br /><br />resource drbd0 {<br /> protocol C;<br /><br /> handlers {<br /> split-brain "/usr/lib/drbd/notify-split.brain.sh root";<br /> }</p>
<p>startup {<br /> wfc-timeout 0; <br /> degr-wfc-timeout 120; <br /> become-primary-on both;<br /> }<br /><br /> disk {<br /> on-io-error detach;<br /> max-bio-bvecs 1; <br /> }</p>
net {<br /> allow-two-primaries;<br /> max-buffers 8000;<br /> max-epoch-size 8000;<br /> sndbuf-size 512k; <br /> after-sb-0pri discard-zero-changes;<br /> after-sb-1pri discard-secondary;<br /> after-sb-2pri disconnect;<br /> }<br /><br /> on enterprise5 {<br /> device /dev/drbd0;<br /> disk /dev/vglocal/lvlocal;<br /> address 192.168.1.15:7788;<br /> flexible-meta-disk internal;<br /> }<br /><br />on enterprise6 {<br /> device /dev/drbd0;<br /> disk /dev/vglocal/lvlocal;<br /> address 192.168.1.16:7788;<br /> flexible-meta-disk internal;<br /><br />
<p>what can I do ?<br />please help me.</p>
<p>Regards<br />Andreas</p>
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