Different sizes between zfs list and zpool list

[Tom Evans]

On Wed, May 5, 2010 at 4:56 PM, Freddie Cash <fjwcash at gmail.com> wrote:
> On Wed, May 5, 2010 at 8:44 AM, Tom Evans <tevans.uk at googlemail.com> wrote:
>
>> When looking at the size of a pool, this information can be got from
>> both zpool list and zfs list:
>>
>> > $ zfs list
>> NAME                       USED  AVAIL  REFER  MOUNTPOINT
>> tank                      5.69T   982G  36.5K  /tank
>>
>> > $ zpool list
>> NAME   SIZE   USED  AVAIL    CAP  HEALTH  ALTROOT
>> tank  8.14T  6.86T  1.28T    84%  ONLINE  -
>>
>> Why the different sizes?
>> The pool is a raidz of 6 x 1.5 TB drives.
>>
>
> zpool lists the raw storage available to the pool.  Every single bit of
> every single drive is listed here.  This will be 6 x 1 TB.
>
> zfs lists only the amount of storage available to be used, after all
> redundancy is taken into account.  This will be 5 x 1 TB.
>
> --
> Freddie Cash
> fjwcash at gmail.com

Ah, that makes sense - also explains why the df output matches up
precisely with the zfs list output.

Thanks

Tom