On Wed, 30 Jan 2013, Gary Aitken wrote:

I used gpart to set up a new disk,
then went through a 9.1 install.
Everything seemed to go fine, but when time came to boot the new drive,
it wouldn't boot.

What did it say?

When doing the 9.1 install,
I selected the disk and had to assign the partitions to the various filesystems.
AFIK, I did not otherwise modify the filesystems.

Does the 9.1 install process trash the boot areas?

My gpart setup was:

 clean up (delete) the original partitions
 gpart destroy ada3

These two steps can be replaced with
  gpart destroy -F ada3

 gpart create -s GPT ada3
 gpart bootcode -b /boot/pmbr ada3
 gpart add -t freebsd-boot -i 1 -s 512K -l gptboot ada3
 gpart bootcode -p /boot/gptboot -i 1 ada3

I do the bootcode in one step:
  gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 ada3

 gpart add -t freebsd-ufs -a 4K -b 1M -s 4G -i 2 -l fbsdroot ada3  # /
 gpart add -t freebsd-swap -a 4K -s 2G -i 3 -l fbsdswap ada3     # swap
 gpart add -t freebsd-ufs -a 4K -s 2G -i 4 -l fbsdvar ada3         # /var
 gpart add -t freebsd-ufs -a 4K -s 2G -i 5 -l fbsdtmp ada3         # /tmp
 gpart add -t freebsd-ufs -a 4K -i 6 -l fbsdusr ada3               # /usr

It's not necessary to use partition numbers with "add", gpart will just use the next one available.

Here are my notes:
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