Reconfigure to boot from extended partition?

[Rashkae]

Derek Broughton wrote:

> 
> All that said (and correctly), I think you might actually have been asking
> about the "bootable" flag on the partition table, and afaik it's completely
> irrelevant to Linux - only Windows cares about that flag.


Not always.

you can install either grub or lilo on the superblock of a partition, 
(and a corresponding Windows Style mbr to boot from 'bootable' or 
'active' parition).

Examples where this *might* be useful:

On a system where you expect to install/re-install windows often.. You 
can repair your grub after a Windows install with any fdisk type 
utility, rather than the usual grub install process.

If, for whatever reason of your own, you want multiple grub boot 
menus/versions on one disk.  you can switch between the different grub 
environments by chancing the active partition.

But I digress.  By default, grub is installed in the MBR of the hard 
drive, in which case, the partition boot flag has no bearing, as you say.