On Wed, 21 Nov 2012, Arthur Chance wrote:
On 11/21/12 05:11, Warren Block wrote:
gptboot looks for the first UFS partition. Maybe /boot/boot can be
modified to do that also.
It's a little more complicated than that Warren.
AIUI gptboot first looks (in partition order) for partitions with both the
bootme and bootonce attributes set. If it doesn't find any, or if they all
failed to boot it then tries booting partitions with just the bootme
attribute. It only boots the first UFS partition if no partitions have the
bootme attribute set, and IIRC that is for compatibility with the 8.x gptboot
which didn't know the boot* attributes.
Confusingly, there's no manual page for gptboot to document this. It's sort
of implicit in the gpart manual page, in the section on ATTRIBUTES for GPT,
but the best way to understand it is to read the code for gptfind in
/usr/src/sys/boot/common/gpt.c
Well, yes. The point is that gptboot doesn't just assume that p2, say,
is where the bootable UFS partition must be.
I've also noted the lack of a gptboot man page, and it's on my long list
of Things That Should Be Done. There was a thread on -doc:
http://lists.freebsd.org/pipermail/freebsd-doc/2012-June/020060.html
Help would be greatly appreciated.
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