[clue] revisiting boot partition and LVM + grub

[Will]

Fedora switched from Grub Legacy to Grub 2 in Fedora 16.  There should be
nothing holding back a fresh install from not having /boot on the same
logical volume as /.


As to the why..
Grub Legacy relied on loading a file system, /boot, to continue chain
loading an OS and it only had support for a few file systems built in.
 Grub 2 gets around this by loading the first block of a stage 1.5 image
directly from a block address on disk.  That image then has the drivers to
load LVM, MD RAID, etc. and continue up the chain.

On Tue, Feb 21, 2012 at 4:20 PM, Aaron D. Johnson
<adj at fnord.greeley.co.us>wrote:

> mike havlicek writes:
> > I always put /boot on a dedicated "traditional" partition but have
> > been thinking about LVM and seem to recall somewhere sometime ago it
> > being suggested that /boot could be on a logical volume. It seems
> > that it was more a grub issue...???
> >
> > Any pointers to why /boot can or can't be on a logical volume. IE
> > possibility/impossibility of building a system that can boot from a
> > single disk with only "8e" partition type?
>
> You don't mention what distro you're running, but there's an article
> with some promising information to be found at
>
> http://jim.studt.net/depository/index.php/debian-lenny-and-grub-with-boot-in-lvm
>
> I can't say if there are any distro installers that support it at this
> point.  I don't recall it being an option with Fedora 15, and it's
> definitely not something the Debian 6.0 installer can handle.
>
> [I had a big bunch of text in here describing my setup, but it's not
> really relevant (/boot is in an MD RAID1 mirror, not on a logical
> volume, and there are _no_ type 8e "partitions" (GPT, baby!).]
>
> Let us know how it goes.
>
> - Aaron
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