[DRBD-user] /dev/drbd0: Failure: (125) Device has a net-config (use disconnect first)

[Wilson Kwok]

Hello, I'am new to DRBD. I'm setting two cluster node using Centos 5.2 in VM. 
 
Here's drbd.conf information:
 
global {
  usage-count no;
}
common {
  protocol C;
}
resource r0 {
  on note1 {
    device    /dev/drbd0;
    disk      /dev/sda5;
    address   10.0.0.220:7789;
    meta-disk internal;
  }
  on note2 {
    device    /dev/drbd0;
    disk      /dev/sda5;
    address   10.0.0.221:7789;
    meta-disk internal;
  }
 }

When I input drbdadm connect r0, it occur following error:
 
[root at node1 ~]# drbdadm connect r0
/dev/drbd0: Failure: (125) Device has a net-config (use disconnect first)
Command 'drbdsetup /dev/drbd0 net 10.0.0.220:7789 10.0.0.221:7789 C --set-defaults --create-device' terminated with exit code 10



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