From: Erik Hensema <erik@hensema.net>
Subject: Re: LVM migration for 2.4->2.6, fallback path?
Date: Sun, 11 Jan 2004 23:05:24 +0000 (UTC)
Message-ID: <slrnc03llk.fvn.erik@dexter.hensema.net>
References: <20040111222223.GA9884@merlin.emma.line.org>
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Matthias Andree (matthias.andree@gmx.de) wrote:
> Hi,
> 
> I understand that the following three combinations work (assuming
> 2.4.24/2.6.1):
> 
> Userspace           Kernelspace
> ------------------------------------------
> LVM1                2.4 LVM
> LVM2                2.4 + devmapper patch
> LVM2                2.6
> 
> But will LVM2 + 2.4 LVM work? LVM1 + 2.6 will not.

Just don't resize your volumes in 2.6, and you'll be fine.
Resizing causes 'vendor lock in' though ;-)

> I presume neither works, but if there is a way, I'd like to know to save
> myself some work.
> 
> Oh, and while I'm at it, what good is the "old ioctl" switch in kernel
> space? I am currently trying without and it works fine with a current
> LVM2 version (which is presumably how things are meant to be).

Just use the new ioctl, the old is just for compatibility with an
old lvm2 userspace. Clearly you don't have that.

-- 
Erik Hensema <erik@hensema.net>
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