F10: something broken with lvm

[Gerry Reno]

Gerry Reno wrote:
> Jonathan Underwood wrote:
>> 2009/4/22 Gerry Reno <greno at verizon.net>:
>>  
>>> Gerry Reno wrote:
>>>    
>>>> We just upgraded a number of machines to F10 and after a few weeks 
>>>> I've
>>>> noticed something wrong with lvm.  Some of our inhouse scripts are 
>>>> breaking
>>>> that deal with lvm.  When I look at /etc/fstab and mount I see 
>>>> entries what
>>>> used to look like:
>>>> /dev/VolGroup00/LogVol01 /                      ext3    
>>>> defaults        1
>>>> 1
>>>> getting changed to this:
>>>> /dev/dm-3   /                     ext3   defaults      1 1
>>>>
>>>>
>>>>
>>>> Where does this '/dev/dm-3' device come from?  I don't find it 
>>>> referenced
>>>> in any of the lvm tool outputs.  Whatever caused this change to happen
>>>> please revert this back to just listing lv's in normal lvm parlance 
>>>> please.
>>>>  These mysterious changes are breaking things and are a complete 
>>>> nuisance.
>>>>  How do we go about undoing these changes and how do we prevent 
>>>> this from
>>>> happening again?
>>>>
>>>>
>>>> Regards,
>>>> Gerry
>>>>
>>>>       
>>> No one responded to this inquiry and these mysterious changes 
>>> continue to
>>> happen.  How can we prevent this from happening?
>>>     
>>
>> Not sure what would cause that. Perhaps related to this bug:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=475773
>>
>> Can you look back through /var/log/yum.log to work out which set of
>> package updates may have triggered the problem - that might provide a
>> clue.
>>
>>   
> Yes, that bug shows something similar but affecting mkinitrd.  These 
> machines were upgraded from F9 and then began having these mysterious 
> changes occur with these /dev/dm-N entries.  These devices bear no 
> resemblence to any mdraid devices or LVM devices and our scripts 
> completely croak with these devices.  Why are perfectly good devices 
> being renamed to absolutely useless names?  All I want to know is how 
> to stop whatever it is that is causing this.
>
> Regards,
> Gerry
>
Filed bug:  https://bugzilla.redhat.com/show_bug.cgi?id=497246

Regards,
Gerry