> Not sure about a physical cd but booting an iso should be possible > using either memdisk from grub2 like in the posting I linked, > > http://ubuntuforums.org/showthread.php?t=1549847&page=13&p=10818457#post10818457 > _or_ also using grub2's own loopback command like described here: > http://michael-prokop.at/blog/2009/05/25/boot-an-iso-via-grub2/ > (but btw the super grub disk iso should also boot directly when dd'd > to an usb key, not only when burned to a cd/dvd.)
> It could only be that the partition table on your disk is somehow > messed up/has leftover data from a previous install that confused > loader and might confuse grub2 too so that it doesn't find the > FreeBSD install... > > I also wonder how or if one can boot a FreeBSD partition from GRUB2 or > > syslinux. > > That's what super grub disk's autodetection should now detect > correctly, if you want to write a grub.cfg entry manually (or type > it live from a grub2 rescue shell) an example is also here: > http://forums.freebsd.org/showthread.php?p=85122#post85122 > but note as I said before if you want to boot a 9.1+ kernel directly > w/o loader you need a grub 2.00 version that has the patch mentioned > here: (that's now in debian and in FreeBSD ports but might not be > in other grub2 versions floating around) > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699002 > Tom > HTH, :) > Juergen I tried to boot the FreeBSD partition directly from Super Grub2 Disk with chainloader +1, but was not successful. I think some FreeBSD boot code is in a small boot partition such as I have on the USB-stick installations, installed with gpart. I wonder if "linux16 memdisk" from grub2 is the same as "KERNEL memdisk" in syslinux: was planning to try it on FreeDOS 1.1 installation fd11src.iso . I also have a memdisk in the latest syslinux installed from FreeBSD ports. Once FreeBSD boots from the USB stick, it accesses the GPT partitions OK as far as I can tell. I could even check with a USB-stick installation of NetBSD, though NetBSD is much less stable than FreeBSD on my modern hardware. I was even thinking of making a giant floppy image, not to write to an actual disk, but to boot via grub2 or possibly grub4dos. I would copy /boot but not including the modules to another directory, apply makefs, mdconfig, mount this image, and bsdlabel. I did something like that with NetBSD 5.1_STABLE i386, and it worked with grub4dos. I would of course have to interrupt the boot to be able to specify the root file system, as I did with NetBSD, or maybe put into loader.conf . map --mem --heads=16 --sectors-per-track=63 (hd0,2)/boot2/nbffs51c.img (fd0) map --hook rootnoverify (fd0) chainloader (fd0)+1 boot and hit the spacebar in time to get the boot menu, so I coulld type boot netbsd -a to specify the root file system, or I could boot any other kernel present in the 40 MB "floppy" image. Grub4dos, being born from DOS, requires setting a (fictitious here) disk geometry. Tom _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"