Re: Considerations for lilo removal
On Mon, Jun 16, 2008 at 02:27:11AM -0500, William Pitcock wrote:
> Hi,
>
> On Mon, 2008-06-16 at 07:20 +0000, Sune Vuorela wrote:
> > On 2008-06-16, William Pitcock <nenolod@sacredspiral.co.uk> wrote:
> > > That doesn't strike me as a valid configuration. Infact, it shouldn't
> > > work with lilo because lilo wants /boot to be on a real device. The fact
> > > that it does should be considered a bug, not a feature.
> >
> > lilo-22.8$ head debian/patches/01_devmapper.dpatch
> > #! /bin/sh -e
> > ##
> > ## All lines beginning with `## DP:' are a description of the patch.
> > ## DP: Patch to make lilo understand device-mapper block devices.
> > ## DP: Bug#229932
> >
>
> That patch only makes lilo map LVMs to an appropriate physical device.
> It does not guarantee that you will be able to boot off of an LV on a
> physical volume. As such, the behaviour is still undefined.
>
> Consider a situation where /boot spans multiple PVs, and you will see
> lilo fail to boot the system correctly.
>
> If /boot happens to be on a single PV, then it will work, but it is
> still not guaranteed.
Il will only work if all extents containing initramfs and kernel are
contiguous and ordered on the physical volume.
Mike
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