[DRBD-user] How to recover data from node3

[fosiul alam]

Hi
I was trying to simulate the process again ..

Now when i tryed to make drbd1 as Secondary

root at drbd1:~# /etc/init.d/drbd status
drbd driver loaded OK; device status:
version: 8.3.7 (api:88/proto:86-91)
srcversion: EE47D8BF18AC166BE219757
m:res         cs          ro                 ds                 p
mounted  fstype
0:home        Connected   Primary/Secondary  UpToDate/UpToDate  C
1:data        Connected   Primary/Secondary  UpToDate/UpToDate  C
10:home-U^^0  StandAlone  Secondary/Unknown  UpToDate/DUnknown  r----
11:data-U^^1  StandAlone  Secondary/Unknown  UpToDate/DUnknown  r----

Now as described in documentation..
in DRBD-DRS

root at drbd-drs:/# /etc/init.d/drbd status
drbd driver loaded OK; device status:
version: 8.3.7 (api:88/proto:86-91)
srcversion: EE47D8BF18AC166BE219757
m:res      cs          ro               ds                 p      mounted
fstype
10:home-U  StandAlone  Primary/Unknown  UpToDate/DUnknown  r----
11:data-U  StandAlone  Primary/Unknown  UpToDate/DUnknown  r----
root at drbd-drs:/# drbdadm connect home-U
root at drbd-drs:/# drbdadm connect data-U

root at drbd-drs:/# /etc/init.d/drbd status
drbd driver loaded OK; device status:
version: 8.3.7 (api:88/proto:86-91)
srcversion: EE47D8BF18AC166BE219757
m:res      cs            ro               ds                 p  mounted
fstype
10:home-U  WFConnection  Primary/Unknown  UpToDate/DUnknown  A
11:data-U  WFConnection  Primary/Unknown  UpToDate/DUnknown  A

so its gone back to WFconnection ..

Shall do you want me to do ?

(a) I make  primary on Low lever device on DRBD1
(B) I turn on Stacked device  on DRBD1
(c) I set secondary on Stacked devices. (DRBD2)

so Again I am missing something ..

Please help me bit more ..
Thanks for your help




On 16 November 2011 13:20, fosiul alam <expertalert at gmail.com> wrote:

> Hi Felix and *Andreas*
>
> thanks, its working now .. but only thing i have done different this time
> is invalidate the data in drbd1 ..
>
> i will simulate the same process couple of time more.. and will come back
> toyou ...
>
> Thanks again on both
>
>
>
> On 16 November 2011 13:00, Felix Frank <ff at mpexnet.de> wrote:
>
>> Hi,
>>
>> On 11/16/2011 10:47 AM, fosiul alam wrote:
>> > root at drbd1:~# /etc/init.d/drbd status0:home  Connected
>> > Secondary/Secondary  UpToDate/UpToDate  C
>> > 1:data  Connected  Secondary/Secondary  UpToDate/UpToDate
>>
>> so if drbd1 is connected...
>>
>> > Croot at drbd2:~# /etc/init.d/drbd status0:home  WFConnection
>> > Primary/Unknown    UpToDate/Outdated  C
>> > 1:data  WFConnection  Secondary/Unknown  UpToDate/Outdated  C
>>
>> ...what is it connected to? I wonder.
>>
>> Getting both your local nodes in Secondary/Secondary is fine. The you
>> must make one Primary and bring up the stacked resources.
>>
>> If you do get split brain between your local stacked resources and the
>> remote resources, you do have to resolve it as hinted by Andreas.
>>
>> Bear in mind that your victim has stacked resources, you will have to
>> discard its data using drbdadm --stacked.
>>
>> HTH,
>> Felix
>>
>
>
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