[linux-lvm] mirrored LV + cmirror problem

Jonathan Brassow jbrassow at redhat.com
Mon Feb 18 16:08:48 UTC 2008

How are you performing the failures?  It looks like just one machine  
is loosing its connection to the device, while the other machines  
links remain in place.


On Feb 17, 2008, at 6:49 AM, Lajkó Attila wrote:

> Here is the output of vgreduce:
> ftp://ftp.ulx.hu/upload/clvmd/vgreduce.tar.gz
> Attila
> 2008. febr. 15, 22:06 DU dátummal Jonathan Brassow <jbrassow at redhat.com 
> >
> ezt írta:
>> If the problem is reproducible, we should be able to track it down.
>> When a failure happens, the kernel sends an event to userspace that
>> signals 'dmeventd' to take action. If we take dmeventd out of the
>> picture, we can run the commands ourselves with higher verbose
>> settings.
>> When you activate the volume, you can 'lvchange -ay --monitor n <vg>/
>> <lv>' - this will prevent dmeventd from monitoring the mirror. Then
>> kill the log device. Finally, run 'vgreduce --removemissing <VG> -
>> vvvv' to perform the recovery. (redirecting all the output to a file
>> will give us something to look at if the failure is reproduced.)
>> We may need to grab debugging output from clvmd too, but that can get
>> messy, so we'll start with this.
>> brassow
>> P.S. It looks like you must have *.debug; in your /etc/syslog.conf,
>> yes?
>> On Feb 15, 2008, at 10:17 AM, Lajkó Attila wrote:
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