Re: LVM disappeared after upgrade in jessie

[Sebastian Weckend <sebastian.weckend@posteo.de>]

I found the problem, here is what happened:

When first creating the raid partition for the lvm, I saved the config 
to /etc/mdadm.conf

Everything worked fine, because somehow it still got detected and was 
assembled as md127. I didnt notice and went on.

It seems that after an update (not shure which) it does not do the 
automated search and assembling of the unconfigured raid partitions 
anymore. I put the missing configuration in /etc/mdadm/mdadm.conf and 
everything is fine again.

thanks, Sebastian


Am 10.03.2016 um 14:43 schrieb Dan Ritter:
> On Thu, Mar 10, 2016 at 01:37:06PM +0100, Sebastian Weckend wrote:
> > In the backup of the LVM configuration I found
> >
> > physical_volumes {
> >      pv0 {
> >          id = "zKO1Xq-VGmI-nX8P-Rwh3-wiFn-GuD4-26dAoZ"
> >          device = "/dev/md127"   # Hint only
> >          status = ["ALLOCATABLE"]
> >          flags = []
> >          dev_size = 5798400896   # 2.70009 Terabytes
> >          pe_start = 2048
> >          pe_count = 707812       # 2.70009 Terabytes
> >      }
> > }
> >
> > but there is no /dev/md127. So it seems it is a software-raid problem.
> >
> > Did I configure the software-raid wrong? And why did it disappear
> > just now? Any idea how I get the partition back?
>
>
> Does it appear in /proc/mdstat in any form? I suspect that the
> device got renamed.
>
> Any mentions of mdadm in dmesg output?
>
> You can examine specific partitions with mdadm -Q /dev/sdXX
>
> -dsr-