boot from ZFS: which pool types use?

[Andriy Gapon]

on 04/07/2013 18:50 Dmitry Morozovsky said the following:
> On Thu, 4 Jul 2013, Andriy Gapon wrote:
> 
>> on 04/07/2013 15:43 Dmitry Morozovsky said the following:
>>> it was/is (and, as I previously stated, is the only ZFS dataset on the 
>>> machine), but unfortunately without explicit setting bootfs property does not 
>>> work :(
>>
>> This is some confusing wording.  We talk about _pools_ on a machine and we talk
>> about _datasets_ in a pool.  So I am not 100% sure what you mean.  Whether you
>> have a single pool, or whether you have a single dataset/filesystem in a pool,
>> or both.
>>
>> Hint: output of commands is usually better than a bunch of free-form text :)
> 
> Ah, I see the point, and the root dataset of the pool is *not* the root in my 
> case:
> 
> root at briareus:/usr/src# zfs list
> NAME                       USED  AVAIL  REFER  MOUNTPOINT
> br                        13.3G  1.05T    31K  legacy
> br/R                      13.3G  1.05T   389M  /
> br/R/db                   8.30G  1.05T  8.30G  /db
> br/R/usr                  4.51G  1.05T  3.44G  /usr
> br/R/usr/local             363M  1.05T   363M  /usr/local
> br/R/usr/ports             416M  1.05T   302M  /usr/ports
> br/R/usr/ports/distfiles   113M  1.05T   113M  /usr/ports/distfiles
> br/R/usr/src               317M  1.05T   317M  /usr/src
> br/R/var                   122M  1.05T   122M  /var
> root at briareus:/usr/src# zpool get bootfs
> NAME  PROPERTY  VALUE   SOURCE
> br    bootfs    br/R    local
> 
> /R is to have single mountpoint and possibility to have other root datasets to 
> use as non-mounted (iSCSI volumes, etc)
> 

Right.  So in this case it is purely a pilot error.  ZFS can not know that among
the available datasets br/R is the root fs.  Thus bootfs must be set.

-- 
Andriy Gapon