Re: changes to the zfs boot (was: Re: git: 72a1cb05cd23 - main - rc(8): Add a zpoolupgrade rc.d script)

Hi,

> Am 09.11.2022 um 21:15 schrieb Alexander Leidinger <Alexander@leidinger.net>:
> Quoting "Patrick M. Hausen" <pmh@hausen.com> (from Wed, 9 Nov 2022 21:02:52 +0100):
>> Yet, I made it a habit to whenever I see this message:
>> 
>> -----------
>> status: Some supported features are not enabled on the pool. The pool can
>> 	still be used, but some features are unavailable.
>> action: Enable all features using 'zpool upgrade'. Once this is done,
>> 	the pool may no longer be accessible by software that does not support
>> 	the features. See zpool-features(7) for details.
>> -----------
>> 
>> to do a "zpool upgrade" after some time of burn in followed by an update of the
>> boot loader.
>> 
>> I desire to know if that is in fact dangerous.
> 
> Ugh. This changed. It is indeed dangerous now. I just tested it with a non-root pool which didn't had all flags enabled. "zpool upgrade <pool>" will now enable all features.

I know. But until now I assumed that features *enabled* but not *used* were not impeding booting.
And that for all others the boot loader was supposed to keep track.

Kind regards,
Patrick