[DRBD-user] Problems converting DRBD to v8

[Andreas Haase - evolver group]

Hi list,

I tried to convert a drbd ressource from version 0.7.25 to 8.0.7 following 
Florians upgrade guide. Problem is that drbdadm does not recognize the v07 
Magic number and offers to generate a new meta data block.

I've attached drbd.conf files for both versions. What can I do to convert 
the drbd ressource without risk of data loss?

Regards,
Andreas
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resource r0 {
  protocol C;
  incon-degr-cmd "echo foo"; # killall heartbeat would be a good alternative :->

  disk {
    on-io-error panic;
  }

  syncer {
    rate 100M; # Note: 'M' is MegaBytes, not MegaBits
  }

  net {
    max-buffers 2048;
    ko-count 4;
    on-disconnect reconnect;
  }

  on rmcfs01 {
    device    /dev/drbd0;
    disk      /dev/cciss/c0d0p1;
    address   172.17.4.1:7789;
    meta-disk  internal;
  }

  on rmcfs02 {
    device    /dev/drbd0;
    disk      /dev/cciss/c0d0p1;
    address   172.17.4.2:7789;
    meta-disk  internal;
  }
}
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global { usage-count no; }
common {
  syncer { rate 100M; }
 
  protocol C;
  handlers {
    pri-on-incon-degr "echo o > /proc/sysrq-trigger ; halt -f";
    pri-lost-after-sb "echo o > /proc/sysrq-trigger ; halt -f";
    local-io-error "echo o > /proc/sysrq-trigger ; halt -f";
  }

  disk {
    on-io-error call-local-io-error;
  }

  net {
    max-buffers 2048;
    ko-count 4;
  }
}

resource r0 {
  on rmcfs01 {
    device    /dev/drbd0;
    disk      /dev/cciss/c0d0p1;
    address   172.17.4.1:7789;
    meta-disk  internal;
  }

  on rmcfs02 {
    device    /dev/drbd0;
    disk      /dev/cciss/c0d0p1;
    address   172.17.4.2:7789;
    meta-disk  internal;
  }
}