Re: Grub on Partitionless Full Disk LVM

[Jack Waterworth]

I believe the lvm module for grub is not robust enough to safely handle 
these types of installations, especially without a partition table.  LVM 
uses the second 512byte sector to store its pvlabel (by default).  In an 
MBR environment, this would area would be used for grub2's core.img 
data. Im not sure what happens to the core.img in a partitionless 
environment, but I suspect it does the same thing.

I attempted to get a similar environment running, but gave up after 
hitting the same road blocks you are.

  Jack Waterworth, Red Hat Certified Architect
  OpenStack Technical Support North America
  Red Hat Global Support Services ( 1.888.467.3342 )

On 02/15/2015 05:44 AM, Andrei Borzenkov wrote:
> В Sat, 14 Feb 2015 22:35:30 -0500
> Dylan Taft <address@hidden> пишет:
>
> > Before I go crazy with this,
> > http://lists.gnu.org/archive/html/grub-devel/2013-09/msg00113.html
> > this patch would also probably solve the issue.  Is support for
> > something like that already upstream?  LVM can leave enough space for
> > grub to use for the complete boot loader with bootloaderareasize and
> > that completely avoids the headache with block maps.
> As you could see, this specific patch was rejected by grub maintainer,
> unfortunately nothing followed it.
>
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