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Date: Tue, 19 Jan 2016 23:23:07 +0000
Message-ID: <CAD=NvSb8TsprJPuOTwCPALPiv9+LRCECy0WUNPx-iobCK5EJUg@mail.gmail.com>
From: Daniel Leong <daniel.leong@gmail.com>
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Subject: [linux-lvm] Accessing LVM cache origin
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Hello,

I'm struggling to find information about lvmcache recovery after the cache
fails. Is it possible to access an LVcache origin if the PV for the cache
has failed?

If I try partial mode :
  lvchange -a y -P fedora/home

Then it just hangs.

If I try the home_corig directly :
  lvchange -a y -P fedora/home_corig

  "Unable to change internal LV home_corig directly"

I can see the LVs with :
   lvs -a -o +devices fedora

The home_corig is still on /dev/sdb3 so I can probably find the blocks if
needed ... but that seems like hard work!

At the moment [cache_cdata] and [cache_cmeta] are on "unknown device"
because it failed. Can I just extend to a new PV for the cache?

Thanks for any tips, and apologies if I'm being stupid.

Dan

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<div dir=3D"ltr">Hello,<div><br></div><div>I&#39;m struggling to find infor=
mation about lvmcache recovery after the cache fails. Is it possible to acc=
ess an LVcache origin if the PV for the cache has failed?</div><div><br></d=
iv><div>If I try partial mode :</div><div>=C2=A0 lvchange -a y -P fedora/ho=
me</div><div><br></div><div>Then it just hangs.</div><div><br></div><div><d=
iv>If I try the home_corig directly :</div><div>=C2=A0 lvchange -a y -P fed=
ora/home_corig</div></div><div><br></div><div>=C2=A0 &quot;Unable to change=
 internal LV home_corig directly&quot;</div><div><br></div><div>I can see t=
he LVs with :</div><div>=C2=A0 =C2=A0lvs -a -o +devices fedora</div><div><b=
r></div><div>The home_corig is still on /dev/sdb3 so I can probably find th=
e blocks if needed ... but that seems like hard work!</div><div><br></div><=
div>At the moment [cache_cdata] and [cache_cmeta] are on &quot;unknown devi=
ce&quot; because it failed. Can I just extend to a new PV for the cache?=C2=
=A0</div><div><br></div><div>Thanks for any tips, and apologies if I&#39;m =
being stupid.</div><div><br></div><div>Dan</div><div><br></div></div>

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