vim /etc/yum.repos.d/yum.system.repo
yum install -y drbd83.x86_64 kmod-drbd83.x86_64 heartbeat.x86_64
yum install -y heartbeat.x86_64

pvcreate /dev/fioa1
vgcreate Storage00 /dev/fioa1
lvcreate -n drbdmeta -L 128M Storage00
vgs
lvcreate -n drbddata -L 74G Storage00

drbdadm create-md repdata
/etc/init.d/drbd start

global { usage-count no; }
resource repdata {
  protocol C;
  startup {
        wfc-timeout 0;
        degr-wfc-timeout     120;
  }
  disk { on-io-error detach; } # or panic, ...
  net {
        cram-hmac-alg "sha1";
        shared-secret "jUP9Uyups";
        after-sb-0pri discard-zero-changes;
        after-sb-1pri discard-secondary;
        after-sb-2pri disconnect;
  } # don't forget to choose a secret for auth !
  syncer { rate 10M; }
  on db1.host.com {
    device /dev/drbd0;
    disk /dev/Storage00/drbddata;
    address 192.168.0.36:7788;
    meta-disk /dev/Storage00/drbdmeta[0];
  }
  on db2.host.com {
    device /dev/drbd0;
    disk /dev/Storage00/drbddata;
    address 192.168.0.40:7788;
    meta-disk /dev/Storage00/drbdmeta[0];
  }
}