I've found the answer to my own question :-).
In fact Grub sounds to not be able to mount the UFS of Dragonfly ;-(. So, I must ask Grub to forward the control to an another bootloader. I've solved by doing this: - I install DFbsd on the partition 2 of my second disk WITH the bootloader (on disk2) - in Grub, I put the following config: title DragonFlyBSD rootnoverify (hd1) chainbootloader +1 Not yet tested, but this should work even if DF is running on Hammer W. On Sat, Nov 12, 2011 at 12:20 PM, william opensource4you <william.o...@gmail.com> wrote: > Just for info ... > > I've a strange problem with Grub. > Indeed, when I unplug the disk1 (netbsd, freebsd and fedora) from my > motherboard, I can boot with DFbsd from disk2. > > It sounds that the problem is coming from Grub and his ability to see > the DFbsd partition. > > I'm running on an AMD 64 bit, but Fedora (managing grub) is a 32bit > installation. Does this could be the cause ? > Then why I've never had issues with other BSD systems ? > I've downloaded the DFbsd32 bit! > > > I'm continuing investigation :-( > Any indea are welcome ;-) > > W > > > > > > On Fri, Nov 11, 2011 at 6:36 AM, william opensource4you > <william.o...@gmail.com> wrote: >> Hi, >> >> I'm willing to give a try to dragonfly, but grub does not boot it ;-( >> >> I have 2 disks: Disk 1 contains netbsd and freebsd on primary >> partitions (p1, p2) and Linux on secondary partition (p5). Disk 2 has >> pcbsd on primary partition (p1), and I've prepared a 15GB partition >> (p2) for dfbsd.. >> >> I'm using an iso of dfbsd 2.10.1 and follow the installation >> procedure. I'm selecting ufs for this partition and.skip the >> installation.of boot0cfg. >> All rest is going well. >> >> In my grub (managed by my linux: last fedora) I've put (same as for >> netbsd and freebsd): >> Root (hd1,1,a) >> Makeactive >> Chainloader +1 >> >> But, when booting, i receive a message saying "partition table invalid >> or corrupted " >> >> I cannot mount my dfbsd neither from Linux, neither from netbsd nor >> freebsd. But by rebooting with the dfbsd cdrom, i can mount my >> partition 2 of the disk 2 !!! >> Does it means that the partition is good ? >> >> I've rerun the grub-install. But this has no effect. >> >> Within the dfbsd mailing list i see that several persons are using >> grub too without problems. >> >> Does someone can guide me ? >> Why does grub see correctly my freebsd and netbsd partitions, even >> pcbsd one, and not dfbsd? >> >> Thanks for.your.advice >> >> William >> >