In freebsd-questions Digest, Vol 390, Issue 1, Message: 18
On Mon, 21 Nov 2011 01:47:27 + Bruce Cran br...@cran.org.uk wrote:
I'm planning to install FreeBSD alongside a whole range of Windows
builds for testing. In 8.x it's possible to tell the installer not to
bother updating the MBR so you can use something like EasyBCD to boot it
via the Windows bootloader instead. Is it still possible on 9.0-RC2
using bsdinstall? I don't seem to remember seeing any option to avoid
writing out the new boot code.
Hi, I gather not (yet?) Can save the MBR with (eg) 'boot0cfg -f ~/mymbr
adaX' for safety, dd it back if need be, and/or use fdisk(8) -p, -t and
-f flags to save, test and restore just the slice table.
At least they're precautions I'm taking, really not wanting to clobber
win2k (for BIOS updates :), 8.2-RELEASE or a shared UFS partition when
next trying to install 9.0-RC2 to slice 2, currently 7.4-RELEASE ..
% boot0cfg -v ad0
# flag start chs type end chs offset size
1 0x00 0: 1: 1 0x0b 1023: 5:63 63 8385867
2 0x00 1023:255:63 0xa5 1023: 13:63 8385930125821080
3 0x00 1023:255:63 0xa5 1023: 15:63134207010 33543342
4 0x80 1023:255:63 0xa5 1023: 14:63167750730 66685815
version=2.0 drive=0x80 mask=0xf ticks=182 bell=# (0x23)
options=packet,update,nosetdrv
volume serial ID a8a8-a8a8
default_selection=F4 (Slice 4)
% fdisk -p ad0
# /dev/ad0
g c232581 h16 s63
p 1 0x0b 63 8385867
p 2 0xa5 8385930 125821080
p 3 0xa5 134207010 33543342
p 4 0xa5 167750730 66685815
a 4
cheers, Ian
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