Boot FreeBSD from 2nd drive, with NT boot manager??

Boot FreeBSD from 2nd drive, with NT boot manager??

Post by mrsi.. » Sat, 31 Aug 1996 04:00:00

I have FreeBSD installed on a second IDE drive. I have Windows NT on the first IDE drive. I would like to use the NT boot manager to boot FreeBSD.

I have read your FAQ in section 6.6 but it only tells me how to boot if FreeBSD is on the same drive as Windows NT! If I try using that 'bootsect.bsd' I get the following error: 'No Bootable Partition'

Thanks in advance,



1. Booting FreeBSD from NT boot manager?

    [courtesy cc of this posting sent to cited author via email]

The answer is in the FAQ:

6.6. How can I use the NT loader to boot FreeBSD?

The general idea is that you copy the first sector of your native root
Linux or FreeBSD partition into a file in the DOS/NT partition. Assuming
you name that file something like c:\bootsect.lnx or c:\bootsect.bsd
(inspired by c:\bootsect.dos) you can then edit the c:\boot.ini file to
come up with something like this:

            [boot loader]
            [operating systems]
            multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Windows NT"

This procedure assumes that DOS, NT, Linux, FreeBSD, or whatever have been
installed into their respective fdisk partitions on the same disk. In my
case DOS & NT are in the first fdisk partition, Linux in the second, and
FreeBSD in the third. I also installed Linux and FreeBSD to boot from their
native partitions, not the disk MBR, and without delay.

Mount a DOS-formatted floppy (if you've converted to NTFS) or the FAT
partition, under, say, /mnt.

In Linux:

            dd if=/dev/sda2 of=/mnt/bootsect.lnx bs=512 count=1

In FreeBSD:

            dd if=/dev/rsd0a of=/mnt/bootsect.bsd bs=512 count=1

Reboot into DOS or NT. NTFS users copy the bootsect.lnx and/or the
bootsect.bsd file from the floppy to C:\. Modify the attributes
(permissions) on boot.ini with:

            attrib -s -r c:\boot.ini

Edit to add the appropriate entries from the example boot.ini above, and
restore the attributes:

            attrib -r -s c:\boot.ini

If Linux or FreeBSD are booting from the MBR, restore it with the DOS
``fdisk /mbr'' command after you reconfigure them to boot from their native



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