zfs/zpool upgrade required?

[Guido Falsi]

On 05/04/11 13:55, Jeremy Chadwick wrote:
> On Wed, May 04, 2011 at 01:02:56PM +0200, Robert Schulze wrote:
>> when upgrading from 8.0 to 8-STABLE, kernel and userland support new
>> versions of ZFS pool and filesystem.
>>
>> Is it _required_ to upgrade existing pools and filesystems or can
>> that be done anytime later?
>
> - It can be done later, though by not upgrading you lose the ability to
> use newer features.  For a list of what those are, refer to the
> official OpenSolaris docs.  See menu on left side, near bottom:
>
> http://hub.opensolaris.org/bin/view/Community+Group+zfs/whatis
>
> - Make sure to note that the pool version and the filesystem version are
> separate.  Some folks remember to "zpool upgrade" but not "zfs upgrade".
>
> - Remember that upgrading is one-way; you cannot roll back to an older
> version without destroying your pools.  If you're worried, do full
> backups beforehand.
>

I'd add, if he's booting off of zfs, that it is very important to 
upgrade the boot code as soon as he upgrades the pool or he will have 
trouble booting the system which could be a pain to recover at that point.

-- 
Guido Falsi <mad at madpilot.net>