How to create a bootable FreeBSD USB
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Current revision as of 21:41, 3 November 2009
This was taken from freebsd-stable list. Thanks Andrew Snow for the detailed how-to!
Message: 16 Date: Wed, 11 Mar 2009 15:19:10 +1100 From: Andrew Snow Subject: Re: Installing FreeBSD from USB flash drive - some experiments Here's the steps I use to create a 1GB USB image: # dd if=/dev/zero of=bootable.image bs=1m count=1 oseek=1000 conv=sparse # mdconfig -a -t vnode -f bootable.image -u 0 # newfs -m 0 -o space -n /dev/md0 # mount /dev/md0 /mnt # cd /usr/src # make installworld DESTDIR=/mnt # make distribution DESTDIR=/mnt # make installkernel DESTDIR=/mnt # umount /mnt At this point you have a file "bootable.image" but instead of actually making that a bootable dd image, I choose to create a dump file which is a bit more flexible as you can restore it to a USB stick of any size. # dump -0 -C 8 -f - /dev/md0 | gzip -9 > bootable.dump.gz # mdconfig -d -u 0 At this point, you have a dump file which you can use to create a bootable USB as follows: Assuming the USB stick is /dev/da0 ! # dd if=/dev/zero of=/dev/da0 bs=16k # fdisk -BI /dev/da0 # disklabel -B -w /dev/da0s1 # newfs -m 0 -o space -n /dev/da0s1a # mount -o noatime,async /dev/da0s1a /mnt # gzcat bootable.dump.gz | ( cd /mnt ; restore -rvf - ) # umount /mnt Hope that helps - Andrew
