svn commit: r264907 - in head/release: amd64 i386

Dmitry Morozovsky marck at
Fri Apr 25 10:00:44 UTC 2014

On Thu, 24 Apr 2014, Don Lewis wrote:


> >> GPT may not be the best choice here. On a number of, in particular, Lenovo
> >> hardware, the BIOS will unconditionally boot with EFI from GPT media. I'm
> >> not sure we want to just swap the set of machines on which this will not
> >> boot. It probably needs to be nested MBR (or straight MBR -- I forget if
> >> that works) until the boot media work with EFI (which should be soon on
> >> -CURRENT).
> > 
> > Noted.  The thing here is that I want to get an EFI GPT partition on the
> > image eventually, which unless I'm missing something obvious, we cannot
> > mix GPT and MBR.
> > 
> > I don't particularly like swapping which machines boot with this hack.
> > Maybe it's time to do a MBR stick for "legacy" boot, and the GPT stick
> > for UEFI and/or "fails-to-boot-DD" case?
> I've got a fairly recent Gigabyte motherboard that refused to boot an
> Ultimate Boot CD memstick which uses MBR.  I found out that I was was
> able to boot and install from a 'dangerously dedicated' FreeBSD 9.x
> memstick. Given that clue, I built a 'dangerously dedicated' Ultimate
> Boot CD memstick, which worked just fine.

seconded, till now the most bootable case for machines under my hands were 
happy with no-partition at all (fake MBR with 50k at s4, dd from UFS)

this situation could drift in the near future though...

D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at ]
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at ***

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