[DRBD-user] Running DRBD 8.2 on one node and 8.3 on another?

[John Du]

Hi,


We are running DRBD 8.2.0 on a pair of servers.  Each server has a 1.3TB 
disk for DRBD.  The servers are connected over a WAN.  A problem we are 
having is that whenever we stop the secondary DRBD, the node locks up.  
The only way out of this is recycle the power.  We do not have this 
problem with other pairs of servers running DRBD 0.7.14 with much 
smaller disks.  We don't know it is the DRBD version or the disk sizes 
that make the difference.


I have two questions:


1. Upgrading from 8.2 to 8.3 does not necessitate  re-generating the 
meta data on the disks,  is that true?


2. Can we upgrade the secondary to 8.3 and synchronize it with the 
primary node running 8.2?  The reason we want to do this  is that the 
primary server will not be stopped and the services it provides will not 
be interrupted.


Thank you for your advice.


John Du