Something

resource r0 {
  protocol      C;
  incon-degr-cmd "echo '!DRBD! pri on incon-degr' | wall ; sleep 60 ; halt -f";
  startup { wfc-timeout 0; degr-wfc-timeout     120; }
  disk { on-io-error detach; }
  syncer {
    rate        60M;
    group       1;   # sync when r2 is finished syncing.
  }
  on db1 {
    device      /dev/drbd0;
    disk        /dev/md7;
    address     192.168.101.26:7791;
    meta-disk   internal;
  }
  on db2 {
    device      /dev/drbd0;
    disk        /dev/md7;
    address     192.168.101.27:7791;
    meta-disk   internal;
  }
}