[DRBD-user] Testing issue with a Primary/Unknown connection

jcrosby jcrosby at scotiaweather.com
Wed Feb 13 16:34:41 CET 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Good afternoon,

I took a look through the mailing list but my issue didn't seem to jump 
out at me, so I'll ask it.

Right now I have DRBD8 tied in with Heartbeat v1.  Running on a Ubuntu 
7.04 install, kernel 2.6.22-14-server. I am running a MySQL database on 
the DRBD partition.

When I power down the secondary machine to simulate a complete hardware 
failure. The /proc/drbd file on the Primary shows:
 cs:WFConnection st:Primary/Unknown ds:UpToDate/DUnknown C r---

I expected to see that, but after a few minutes my mounted partition 
suddenly stopped responding.  I could cd into it, but couldn't do 
anything else.

Is this suppose to happen, and if it is how can I stop it from 
happening?  Since having my database freeze up if any of the DRBD nodes 
go out is not really helpful.

Here is my drbd.conf file:
*resource r0 {
  protocol C;
  startup {
    wfc-timeout         0;  ##
    degr-wfc-timeout  120;  ## 2 minutes.
  disk {
    on-io-error detach;
  net {
    # timeout           60;
    # connect-int       10;
    # ping-int          10;
    # max-buffers     2048;
    # max-epoch-size  2048;
  syncer {
        rate 100M;
  on Primary {
    device      /dev/drbd0;
    disk        /dev/sdb2;
    meta-disk   internal;

  on Secondary {
    device     /dev/drbd0;
    disk       /dev/sda4;
    meta-disk   internal;

Joseph Crosby
Network Administrator
Scotia Weather Service Inc.
netadmin at scotiaweather.com
A byte walks into a bar and orders a pint. Bartender asks him "What's wrong?" Byte says "Parity error." Bartender nods and says "Yeah, I thought you looked a bit off."

More information about the drbd-user mailing list