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Re: [PATCH 3/5] msdos-part: allow embedding in extended partition


From: Lennart Sorensen
Subject: Re: [PATCH 3/5] msdos-part: allow embedding in extended partition
Date: Wed, 12 Sep 2012 12:57:01 -0400
User-agent: Mutt/1.5.20 (2009-06-14)

On Wed, Sep 12, 2012 at 03:25:43PM +0800, Michael Chang wrote:
> Installing on extended partition is one of scenarios for SUSE and
> openSUSE installation. If the /boot resides in a logical partition,
> the installer would propose installing bootloader to extended
> partition.  For historic reasons, we prefer partition bootsector than
> mbr, and use a generic mbr boot code to control the booting to active
> partition. This is good or bad depends on what's the your view point,
> but the point here is that for users who upgrade to grub2, we don't
> want to break his current setup and still offer him the same options
> he used to install grub. This is the major reason why we have to
> install grub2 to extended partition.
> 
> I could understand the patch is not good to be accepted , although it
> works to solve our problem for now. However we'd like to feedback our
> situation here and hope that grub2 could consider to support
> installing to extended partition (I believe there must be more people
> needs it) or point us a direction how to fix this problem cleanly.

How much room is there in the filesystem for embedding the boot loader?
It must depend on the filesystem in use too.

What do you do when the disk is over 2TB in SUSE?  You must be using
GPT instead for that.  Do you still try to embed the bootloader into
the filesystem rather than use a GPT boot partition?

After all getting rid of the block mapping in grub2 has made it a lot
less fragile, although you can still do it if you force it.

-- 
Len Sorensen



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