[DRBD-user] downgrade from 8.2 to 0.7

Szilard Greszler szilard.greszler at ericsson.com
Wed Sep 24 10:03:56 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.

remove "not" from my question  :)


Szilard Greszler wrote:
> 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?
> BR,
> Szilárd
> 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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