dd if=/dev/r<disk>a of=openbsd.pbr bs=512 count=1
Replace <disk> with your disk (commonly sd0), so it becomes, for example, /dev/rsd0a.
On 12/30/2015 03:30 PM, 张腾 wrote:
Could anybody please tell me what is the specific location of openbsd.pbr ? It seems that i can't find it.

