ZFS: separate pools

[Eric Damien]

On Monday 03 May 2010 22:34:57 Emil Mikulic wrote:
> On Mon, May 03, 2010 at 10:16:57PM -0400, Charles Sprickman wrote:
> > Just some random data.  I know when I was reading about ZFS I did
> > come across some vague notion that zfs wanted the entire drive to
> > better deal with queueing, not sure if that was official Sun docs or
> > some random blog though...
> 
> ZFS on Solaris only enables write caching when it's given an entire disk.
> pjd@ has stated that this does not affect FreeBSD, only Solaris.
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So, correct me if I am wrong: 
1- I need to let go the slice/partitions concepts and now think in matter of 
pool/filesystems ?
2- And assuming "1-" is right, I have to dedicate an entire disk to a zpool ?
3- If "2-" is also true, my preoccupation now is, when I shall need to 
reinstall the OS, what are the steps to go through in order to preserve my 
data - especially the "/home" filesystem -, across the two installations ?