Note for those pulling in new ZFS feature flags

[Kubilay Kocak]

On 8/04/2014 3:01 AM, Paul Mather wrote:
> On Apr 7, 2014, at 11:30 AM, Chris Nehren <cnehren+freebsd-stable at pobox.com> wrote:
> 
>> On Mon, Apr 07, 2014 at 17:05:32 +0200, Trond Endrestøl wrote:
>>> See:
>>>
>>> http://svnweb.freebsd.org/base/stable/10/cddl/contrib/opensolaris/cmd/zpool/zpool_main.c?view=markup#l4992
>>>
>>> Consider this a lesson learned. Yes, I too was bitten by this once, 
>>> but never again. ;-) Luckily, I recovered using a snapshot image.
>>
>> That's funny, because I *specifically* noted the absence of that
>> message when I upgraded my pool and spent about 5 minutes
>> wondering if it was needed or not.  Either way, I think I'll opt
>> to doing the bootcode thing every time as well.
> 
> Oddly enough, I was bitten by this recently, too, and had the same 
> thing happen.  I upgraded a pool and was struck by the fact that I 
> *wasn't* urged to update the boot code and so, after pondering "maybe 
> this means I don't have to" decided not to.  Of course, the system 
> wouldn't boot and I had to rescue it via a memstick.
> 
> I prefer the unconditional warning. :-)
> 
> Cheers,
> 
> Paul.
> 
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> 

Makes me wonder:

What might the issues be with upgrading the bootcode for users post-upgrade?