[DRBD-user] Upgrade from 0.7 to 0.8 possible without data loss?

[Oliver Welter]

Hi Lars

>> 1) Is there a way to keep 0.7 and 0.8 in sync at least "one way" from 
>> 0.7 as primary and 0.8 as slave during the update
> 
> no.

Thats sad :(

>> 2) Can I keep my data parts of the disks - I use internal meta-data 
>> storage? I tried "drbdadm create-md test" on a test partition and it 
>> SEEMS to work - but before I destroy any valuable data I want to go for 
>> sure....
> 
> it "should" work. it is intended to be used that way.
> it did work for us in our testing environments.
> but in case it eats your data for some reason,
> and you don't have backups, that would be your problem, not mine ...

Sure - backups are there but just converting the meta data is a task of
minutes and creating totally new disks will take some hours of service
downtime

> but. thinking HA,
> when 0.7.23 works for you, why would you want to upgrade a reliably
> working known good production platform to a new version,
> when you don't need the new features?

See the null pointer post - it does not work after a kernel upgrade that
was necessary du to security concerns.

Oliver
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