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Re: LVM and mdadm


On Sat, 4 Apr 2015 13:04:16 +0200
Petter Adsen <petter@synth.no> wrote:
> > Please post the output of vgdisplay -v.
> Here goes. "freshinstall" is just a snapshot of the system right after
> the first boot.

Yup. vgdisplay -v says just that.

> root@fenris:~# vgdisplay -v
>     DEGRADED MODE. Incomplete RAID LVs will be processed.
>     Finding all volume groups
>     Finding volume group "ROOTVG"
>   --- Volume group ---
> <skip>

Ok, I have a good news, and I have a bad news.

The good news are:

1) You don't have any mirrored LVs. Such LVs are explicitly marked by
having 'Mirrored volumes', and you have none of those.

2) You don't seem to have a problem with your LVM configuration,
everything appears to be in place.

And the bad news are:

'-v' option misleads you.

It says that 'Incomplete RAID LVs will be processed' and other
scary stuff regardless of presence of such LVs. It says 'DEGRADED
MODE', even in the case there everything is OK.

About the only way to know for sure whenever it's OK or not - is to
carefully view the status of every VG, LV and PV.

In fact, it seems that any LVM command with '-v' option will spew such

It's Jessie's new feature, and it seems that nobody cared about
documenting it. Short of original bug report, of course - [1].

[1] https://bugzilla.redhat.com/show_bug.cgi?id=905063


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