[syslinux] chainboot from grub to syslinux in logical partition

[H. Peter Anvin]

Cynthia Flynn wrote:
> 
> So, is there some fundamental reason why grub should not be able to 
> chainload a logical partition with a proper syslinux VBR and ldlinux.sys 
> or am I still missing something in my procedure? Perhaps syslinux does 
> not in fact write a proper VBR in a logical partition?
> 

There is a bug in quite a few versions of Grub when it comes to
chainloading logical partitions: it passes bogus partition informations
to the chainloaded boot sector.  That's most likely what you are running
into.

As far as "Boot error" being uninformative... well; it's really hard to
squeeze more information into the boot sector.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.