Boot problems afther reinstall windows

[Jerry McAllister]

> 
> Windows was able to boot afhter I installed it. I never touched
> boot.ini. The content would have been:
> 
> [boot loader]
> timeout=30
> default=multi(0)disk(0)rdisk(0)partition(2)\WINDOWS
> [operating systems]
> multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn
> 
> I now use a different solution. Instead of the freebsd bootloader
> (boot0). I now use the windows bootloader. I copied boot1 to
> c:\freebsd.bin. Then modified windows boot.ini as follow:
> 
> [boot loader]
> timeout=10
> default=c:\freebsd.bin
> [operating systems]
> multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP
> Professional" /fastdetect /NoExecute=OptIn
> c:\freebsd.bin="FreeBSD 5"
> 
> This works for me. I still wonder why the stuff below didn't work. In
> the past I would do this with /stand/sysinstall. But I don't dare to do
> this with FreeBSD 5 because of drive geometric warnings.
> 

Remember there are two boot blocks, so to speak.
There is the MBR that lets you choose which slice to boot.  There is 
only one of those per disk and it lives in "sector 0" of the disk.
The MBR generally has a standard calling sequence (that the Bios calls)
and sets things up to a fairly standard condition and looks for
standard appearing boot sectors in slices and makes a standard
call to the selected slice's boot sector.   Almost any MBR that
knows how to recognize a standard boot sector in a slice and lets
you choose between them if there are more than one can be used
interchangeably.

Then there is the boot block with the actual boot loader that starts 
pulling the OS from the bootable partition.   On a multi boot disk 
there are several - one per each bootable slice and they live in the 
boot sector of each slice.    Those are specific to the OS they are 
booting.  Though their calling sequence is standard, what they have 
to do to load and start their own OS is not.

I am guessing that you managed to overwrite or damage the MS slice'
boot sector while you were doing things, or didn't get it written
to the slice properly when you reloaded or something like that.
Even though you put the MBR back with FreeBSD's fdisk, did you
also make sure that the MS slice had its own boot loader?   Anyway
you did when you put the MS boot loader back.   So it works now.

////jerry

> 
> On Tue, Mar 15, 2005 at 02:12:46AM +0000, Jason Henson wrote:
> > What is in your windows boot.ini file?
> > 
> > 
> > On 03/14/05 11:13:49, Alex de Kruijff wrote:
> > >Hi,
> > >
> > >I've recently reinstalled windows. Windows removes the MBR as you
> > >know.
> > >So ather I installed it I set partion 1 (FreeBSD) active and  
> > >rebooted.
> > >Then I followed the handbook and did fdisk -B -b /boot/boot0 ad0. Now
> > >I
> > >get the orginal screen afther booting. Only it beeps when I press F2
> > >(Windows). I can mount the second partion on FreeBSD, but cant boot.
> > >Any
> > >ideas to what I'm missing here?
> > >
> > ># fdisk
> > >******* Working on device /dev/ad0 *******
> > >parameters extracted from in-core disklabel are:
> > >cylinders=484521 heads=16 sectors/track=63 (1008 blks/cyl)
> > >
> > >Figures below won't work with BIOS for partitions not in cyl 1
> > >parameters to be used for BIOS calculations are:
> > >cylinders=484521 heads=16 sectors/track=63 (1008 blks/cyl)
> > >
> > >Media sector size is 512
> > >Warning: BIOS sector numbering starts with sector 1
> > >Information from DOS bootblock is:
> > >The data for partition 1 is:
> > >sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
> > >    start 63, size 20971377 (10239 Meg), flag 80 (active)
> > >        beg: cyl 0/ head 1/ sector 1;
> > >        end: cyl 1023/ head 104/ sector 63
> > >The data for partition 2 is:
> > >sysid 12 (0x0c),(DOS or Windows 95 with 32 bit FAT (LBA))
> > >    start 20980890, size 20948760 (10228 Meg), flag 80 (active)
> > >        beg: cyl 1023/ head 0/ sector 1;
> > >        end: cyl 1023/ head 254/ sector 63
> > >The data for partition 3 is:
> > >sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
> > >    start 41942880, size 446454288 (217995 Meg), flag 80 (active)
> > >        beg: cyl 1023/ head 210/ sector 1;
> > >        end: cyl 1023/ head 80/ sector 63
> > >The data for partition 4 is:
> > ><UNUSED>
> > >
> > >--
> > >Alex
> > >
> > >Please copy the original recipients, otherwise I may not read your
> > >reply.
> > >WWW: http://www.kruijff.org/alex/FreeBSD/
> > >_______________________________________________
> > >freebsd-questions at freebsd.org mailing list
> > >http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> > >To unsubscribe, send any mail to "freebsd-questions- 
> > >unsubscribe at freebsd.org"
> > >
> > >
> > >
> > >
> 
> -- 
> Alex
> 
> Please copy the original recipients, otherwise I may not read your reply.
> WWW: http://www.kruijff.org/alex/FreeBSD/
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