F10: something broken with lvm

Gerry Reno greno at verizon.net
Wed Apr 22 22:04:40 UTC 2009


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




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