[DRBD-user] Problems restarting DRBD 8.3 cluster after power failure

Clint Rosander clint at vmix.com
Sat Apr 4 01:06:32 CEST 2009

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


We recently had a the joy of experiencing a power failure at our  
datacenter.

I have setup a few different clusters using a 2 node Active/Passive  
DRBD/Heartbeat configuration with MySQL running on the Active/Primary  
node. These clusters are setup using versions DRBD 0.7.21 and  
Heartbeat 2.0.7. When these boxes rebooted, and I restarted DRBD and  
Heartbeat on the Primary and Secondary nodes in each cluster,  
everything got back to their original states with no problems.

I have a new cluster I have been doing a proof of concept on, with  
the same 2 node style configuration, except running versions DRBD  
8.3.0 and Heartbeat 2.07. When I restarted DRBD on these servers I  
got the following:

Node #1:

drbd driver loaded OK; device status:
version: 8.3.0 (api:88/proto:86-89)
GIT-hash: <removed> build by root at node1, 2009-02-03 10:44:58
m:res            cs         ro                 ds                 p   
mounted  fstype
0:??not-found??  Connected  Primary/Secondary  UpToDate/UpToDate  C
1:??not-found??  Connected  Primary/Secondary  UpToDate/UpToDate  C

Node #2:

drbd driver loaded OK; device status:
version: 8.3.0 (api:88/proto:86-89)
GIT-hash: 9ba8b93e24d842f0dd3fb1f9b90e8348ddb95829 build by  
root at node2, 2009-02-03 16:28:26
m:res            cs         ro                 ds                 p   
mounted  fstype
0:??not-found??  Connected  Secondary/Primary  UpToDate/UpToDate  C
1:??not-found??  Connected  Secondary/Primary  UpToDate/UpToDate  C


Can anyone please explain what the ??not-found?? means and why  
everything else in the status info looks like everything is fine?  
However, I do not see that the two devices that represent resource 0  
and 1 ever got mounted:

df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/md2               5036224   1742416   3037980  37% /
/dev/md1                194366     13364    170967   8% /boot
none                   2020692         0   2020692   0% /dev/shm
/dev/md5              38637728     81852  36593140   1% /opt


The mounted disks should look like:

df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda3              5036316   2490456   2290028  53% /
/dev/sda1               194442     20111    164292  11% /boot
none                   4083052         0   4083052   0% /dev/shm
/dev/sda7             64033092   9845224  50935112  17% /opt
/dev/drbd0           280987876  10224568 256489960   4% /data
/dev/drbd1            61931268  49201936   9583408  84% /logs


Any help would be greatly appreciated. Thanks!

Clint
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