Hi all. this is my little expirience , it may be useful using openbsd & linux in tha same hard disk .
I made the openbsd area by LINUX's fdisk. namely fdisk -l /dev/sdb (500GB USB hard disk) Device Boot Start End Sectors Size Id Type sdb1 22528 3891199 3868672 1.9G 82 Linux swap / Solaris sdb2 2048 22527 20480 10M c W95 FAT32 (LBA) sdb3 3891200 842751999 838860800 400G 5 Extended sdb4 842752000 976773167 134021168 63.9G a6 OpenBSD <-------- sdb5 3893248 213608447 209715200 100G 83 Linux sdb6 * 213610496 528183295 314572800 150G 83 Linux sdb7 528185344 842751999 314566656 150G 7 HPFS / NTFS / exFAT i want to install openbsd OS into sdb4 . But to install OpenBSD directly is risky . if i fail , i lose all (including linux) . So I changed the strategy. install first on 2G USB. then clone copy to 500G USB sdb4 . After connecting the 2G USB and 500G USB , I boot by openbsd CD . press ctrl + c, I look at the way of 2G and 500G by 'dmesg' . 500G is recognized as sd1. 2G as sd2. i install openbsd OS into ---OpenBSD area---. When sd1 is formatted , i put ctrl + c. my way is always a (/) and b (swap) only . so # mkdir / mnt0 # mkdir / mnt1 # Mount /dev/sd2a / mnt0 # Mount /dev/sd1a / mnt1 # (cd / mnt0;. tar cvpf -) | (cd / mnt1; tar xpf -) clone copy itself is completed. But the boot loader is not . Therefore I will install boot loader . afte unplug the 2G, put 500G only ,then i boot by openbsd CD. Now select the ---upgrade---, When i came to the stage 'bsd.rd etc', i select ---abort---. all is done . by using previos menu.lst , i boot openbsd in 500G by grub4dos . After i launched openbsd , I comment out the xdm in /etc/rc.conf.local. sorry for my poor english --- tuyosi takesima , Japan