[DRBD-user] meta-data error

Bas van Schaik bas at tuxes.nl
Sat Mar 15 16:40:27 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.


Hi Swetha,

Now, what was the problem in this case?

  -- Bas


Swetha - wrote:
> Yes i got the answer sir. Thanx
>    
>   Regards
>   Swetha
>
> Bas van Schaik <bas at tuxes.nl> wrote:
>   Hi Swetha,
>
> First of all: DRBD metadata has _nothing_ to do with your filesystem.
> The DRBD metadata is used to keep track of the current status of the
> device and the other node.
>
> Knowing that, it is easy to understand that the file disappearing has
> nothing to do with the DRBD conversion. Actually, if you were able to
> mount /export using DRBD 0.7.21 and you were able to mount /export after
> upgrading to DRBD 8.2.5, it is almost safe to assume that there is
> nothing wrong with the filesystem and thus nothing wrong with DRBD. If
> there would be something wrong with DRBD, your machine would refuse to
> mount /export.
>
> Maybe a stupid question: did you actually mount /export? Was it mounted
> when you created the HTML-file? Possible problems:
> - you created the HTML-file on an unmounted mountpoint, so it is
> currently located on your root filesystem
> - you created the HTML-file on the mounted /export, but forgot to mount
> it after the DRBD upgrade and now you're looking at an unmounted mountpoint
>
> -- Bas
>
>
> Swetha - wrote:
>   
>> Hi,
>>
>> I have upgraded my system from DRBD-0.7.21 to DRBD-8.2.5
>>
>> I have mounted default webserver of linux (/export) and i have created a html page in it.
>>
>> But after i upgraded my system i found that i didnt have the html page in upgraded version (8.2.5) that i created in my older version (0.7.21)
>>
>> When i typed this following command 
>>
>> [root at slave drbd]# drbdadm create-md export
>> v08 Magic number not found
>> md_offset 0
>> al_offset 4096
>> bm_offset 36864
>>
>> Found some data
>> ==> This might destroy existing data! <==
>>
>> Do you want to proceed?
>> [need to type 'yes' to confirm] yes
>>
>>
>> Valid v07 meta-data found, convert to v08?
>> [need to type 'yes' to confirm] yes
>>
>> Converting meta data...
>> Writing meta data...
>> New drbd meta data block sucessfully created.
>>
>> What is the problem?What is the solution?
>>
>> Regards
>> Swetha
>>
>>
>> ---------------------------------
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>>     
>
>
>
>        
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