adding drive to raidz1

[Paul Schenkeveld]

On Thu, Jun 18, 2009 at 06:04:17PM -0700, Randy Bush wrote:
> on the two bootables
>     s1 is a small gmirroed boot
>     s2 is a non-mirrored swap

If the system swaps, a read error on the swap device will panic the
system.

Although swap data is always transient and after a reboot generally not
interesting anymore, I ALWAYS put swap on a mirror/raid3/raid5/raidz
just to make sure the system survives a read error, especially with
remote systems.

>     s3 is pool

Paul Schenkeveld