[DRBD-user] Data loss drbd in split-brain...

Fabio Gomes fabiogomes at 9rgirj.com.br
Fri Aug 7 20:09:23 CEST 2015

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

Recently I had a split-brain and all data created in last day 
disappeared on primary server, my servers are turned on at 6:00 am and 
turned off at 11:00 pm every day, what disappeared was only the data 
created in the last day before the split-brain, all other data still 
intact, the split-brain occurred at start up of the servers...

I´m using Ubuntu 14.04 with drbd 8.4.3. Does anybody know what could  
happened ?

Why my data has dissapeared ?

my configs are:

global {
         usage-count yes;

common {

         protocol C;

         syncer {
                 rate 100M;

resource drbd0 {

    startup {
       become-primary-on srvnononas;
       wfc-timeout 180;

    net {
      cram-hmac-alg sha1;
      shared-secret "senhadrbd";

    syncer {
     verify-alg md5;

    on srvnononas {
     device     /dev/drbd0;
     disk       /dev/sdb2;
     meta-disk  internal;

   on shadownas {
     device    /dev/drbd0;
     disk      /dev/sdb2;
     meta-disk internal;

Thanks for the help,

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