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Re: How do I turn on LVM on RAID in 32-bit etch: SOLVED



On Mon, Jul 17, 2006 at 05:21:42PM -0400, hendrik@topoi.pooq.com wrote:
> On Mon, Jul 17, 2006 at 09:55:42AM -0700, Andrew Sackville-West wrote:
> > On Sun, Jul 16, 2006 at 09:26:33PM -0400, hendrik@topoi.pooq.com wrote:
> > > A fresh install from the debian-testing-i386-netinst
> > > CD, donloaded 2006 07 15, on partition /dev/hda2 on my AMD64 box.
> > > It now dual-boots 32-bit or 64-bit etch.
> > > 
> > > When I ask the 32-bit system to mount one of the LVs, it just 
> > > complains that it can't find the special device /dev/VG2/LV1
> > > The 64-bit system just goes ahead and mounts it.
> > > 
> > > What packages/modules do I have to install/configure/modprobe or
> > > whatever to get the 32-bit system to recognise this stuff.
> > 
> > just for kicks and grins, do you have lvm-common, lvm2 and lvm10
> > installed?
> 
> OK.  I'm so embarassed to admit I hadn't.

It turns out that I also had to install package mdadm.

I installed it so I could inspect the situation and maybe get a clue as 
to why it did not work.  But it turns out that just installing it made 
the difference.

I though it was to administer md systems -- create, adjust, and the 
like.

It turns out it is also used at boot time to recognise existing 
ones.

So the conclusion:
To get the existing software RAID to be recognised, install mdadm.
To get the existing LVM partitions on the RAID to be recognised, you 
likely need lvm-common, lvm2 and lvm10.  (Don't know for sure;  I didn't 
try uninstalling them to see it fail after I got it all working)

-- hendrik



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