[DRBD-user] Problem with upgrading drbd storage

[Stefan Seifert]

On Monday 23 November 2009 16:30:23 Stefan Priebe - allied internet ag wrote:

> I've now done the following:
> 1.) stopped the backup machine
> 2.) upgraded the Raid 10 in that machine (without destroying any data)
> 3.) deleted partition and created new bigger partition on that device
> 4.) Data is still there when i mount the partition i see everything
> 5.) but drbd does not start to sync after starting drbd.
> 
> Where has the metadata gone? Shouldn't drbd able to sync now?

DRBD stores it's meta data at the end of the used device. So it cannot find it 
anymore since you moved the end away from the meta data. That's the reason why 
one should follow the DRBD user's guide which tells you to do the resize while 
drbd is online, so drbd still knows where it's meta data is and can move it to 
the new end of the device. Offline resize is much more difficult.

Regards,
Stefan
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