Dualboot with Windows 7

David Demelier demelier.david at gmail.com
Mon Mar 19 07:28:09 UTC 2012

On 19/03/2012 07:28, Polytropon wrote:
> On Sun, 18 Mar 2012 23:05:58 +0100, David Demelier wrote:
>> Hello,
>> I try to create a dualboot with Windows 7, I set up partitions like that :
>> ada0s1 ->  NTFS (windows recovery)
>> ada0s2 ->  NTFS (windows main partition)
>> ada0s3 ->  BSD
>> 	ada0s3a ->  freebsd-swap (3G)
>> 	ada0s3b ->  freebsd-ufs / (remaining space from drive)
> Erm... according to traditional partitioning, isn't
> the 'a' partition reserved for booting, 'b' for swap?
> I see you have installed everything into one / partition
> which technically is no problem and should work, but
> it's not on the boot partition.

You're right, but I made a mistake while writing, my a partition is / 
and b is swap.

>> And then I let the installer complete the step, because FreeBSD didn't
>> let you (since 9.0) choose between the boot manager nothing was
>> installed and the boot directly goes to Windows 7.
> You need to install all the required stages for booting.
> If I understand the process correctly, the slice 's3' needs
> code to "branch" to the boot partition (which is supposed
> to be the 'a' partition), and the boot selector needs to
> be accessed from the "beginning of the disk" - you said
> you're using EasyBCD for this which is okay.

I followed the part 13.3.2 from 

I think this should be enough, isn't it? it says bsdlabel -B will 
replace the boot1 and boot2 stage so all of them are installed.

Now the question is how to branch the a partition as the "boot partition" ?

>> I installed EasyBCD to add a new entry to FreeBSD on the third
>> partition, but when I choose the FreeBSD entry nothing happens, only the
>> _ character blinking.
> I assume missing boot characteristics as described above.
> Please review your installation process and maybe re-do it.
> In worst case, drop to command line for using the "traditional
> toolset" to apply the proper slicing and partitioning.
> According to "man fdisk" and "man bsdlabel", you should be
> able to write the required boot characteristics to allow
> the correct boot process.
>> Thus I tried bsdlabel -B ada0s3 from the FreeBSD iso shell but it didn't
>> solve. What can I do to boot FreeBSD now?
> As this part is done, I suppose incorrect partitioning.
> 2.6.5 Creating Partitions Using Disklabel
> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/install-steps.html
> Refer to table 2-2: "Partition Layout for First Disk".
> Boot manager and MBR handling are also covered in this chapter.

David Demelier

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