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From: csanyipal@gmail.com
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Subject: Re: [linux-lvm] lvcreate - device not cleared Aborting. Failed to
	wipe start of new LV.
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MegaBrutal <megabrutal@gmail.com> writes:

> 2015-06-21 7:49 GMT+02:00 <csanyipal@gmail.com>:
>> # lvcreate --verbose --size 10.10G -n var bubba
>>   DEGRADED MODE. Incomplete RAID LVs will be processed.
>
> Hey, I just notice, your VG is in degraded mode. This is not a normal
> condition and it can also cause unexpected things. Why is your VG
> degraded? Does it have missing PVs?

# vgdisplay -vvv
 DEGRADED MODE. Incomplete RAID LVs will be processed.

Indeed.
I don't know why is mine VG degraded.
How can I know does it have missing PVs?
What can I do to fix this problem?

-- 
Regards from Pal