[DRBD-user] downgrade from 8.2 to 0.7

Szilard Greszler szilard.greszler at ericsson.com
Wed Sep 24 10:00:54 CEST 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

I tried the conversion and generation counters got zeroed out.
So you say that this is not a problem as long as my drbd is consistent 
and not in secondary/secondary?


Lars Ellenberg wrote:
> On Tue, Sep 23, 2008 at 04:54:11PM +0200, Szilard Greszler wrote:
>> Hi all,
>> My question is to the developers of DRBD.
>> Do you plan to finish the metadata conversion from v08 to v07 in the  
>> near future?
>> I'm developing a system which uses DRBD, and roll back to a previous  
>> version is a requironment on it.
>> I see that there is no any change on that part of code in 8.2.7rc1. How  
>> probable that this conversion is going to be fully implemented in the  
>> final 8.2.7?
> what is it that you think is missing to call it "fully implemented"?
> there is one fundamental problem: v08 UUIDs can express more
> than v07 generation counters. it is impossible to convert them back.
> that makes the back conversion fundamentally broken.
> but as long as you make sure your drbd is in "Secondary/Secondary
> UpToDate/UpToDate" before you take it down and back-convert, there is
> nothing that can go wrong.
> but to just answer the actual question(s):
>  "No."

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