resource drbdopt {
  protocol C;
  meta-disk internal;
  device /dev/drbd1;
  syncer {
    verify-alg sha1;
    csums-alg sha1;
    rate 40M;
  }
  disk {
    on-io-error   detach;
  }
  net {
    after-sb-0pri discard-zero-changes;
    after-sb-1pri discard-secondary;
    after-sb-2pri disconnect;
  }
  on a1.cluster.univ.kiev.ua {
    disk "/dev/disk/by-id/wwn-0x17344293514787180544x-part1";
    address 10.25.240.251:7789;
  }
  on a2.cluster.univ.kiev.ua {
    disk "/dev/disk/by-id/wwn-0x17422262083336032256x-part1";
    address 10.25.240.252:7789;
  }
}