[zfs-discuss] zpool list vs zfs list, size differs...

[Johan Andersson]

Tomas Ögren wrote:
> On 07 February, 2009 - Johan Andersson sent me these 1,5K bytes:
>
>   
>> Hi,
>>
>> New to OpenSolaris and ZFS...
>> Wondering about a size difference I see on my newly installed 
>> OpenSolaris system, Homebuilt AMD Phenom system with SATA3 disks...
>>
>> [code]
>> johan at krynn:~$ zpool list
>> NAME SIZE USED AVAIL CAP HEALTH ALTROOT
>> rpool 696G 7.67G 688G 1% ONLINE -
>> zpool 2.72T 135K 2.72T 0% ONLINE -
>>     
>
> The pool has disks that can hold ...
> 4*750000000000/1024/1024/1024/1024 =~ 2.72TB
>
>   
>> johan at krynn:~$ zfs list
>> NAME USED AVAIL REFER MOUNTPOINT
>> rpool 11.5G 674G 72K /rpool
>> rpool/ROOT 3.78G 674G 18K legacy
>> rpool/ROOT/opensolaris 3.78G 674G 3.65G /
>> rpool/dump 3.87G 674G 3.87G -
>> rpool/export 18.7M 674G 19K /export
>> rpool/export/home 18.7M 674G 50K /export/home
>> rpool/export/home/admin 18.6M 674G 18.6M /export/home/admin
>> rpool/swap 3.87G 677G 16K -
>> zpool 94.3K 2.00T 26.9K /zpool
>>     
>
> In that pool, due to raidz, you can store about ...
> 3*750000000000/1024/1024/1024/1024 =~ 2TB
>
>   
>> The disks are all 750GB SATA3 disks, why is zpool listing the raidz 
>> zpool as 2.74TB but zfs list the /zpool filesys as 2.0TB?
>> Is this a limit of my server in some way or something I can "tune" up?
>>     
>
> Space worth about 1x750GB is lost to parity with raidz..
>
> /Tomas
>   
Thanks,
I didnt realize that the pool counted in the parity data...
I should have though... if I had bothered to calc it

*duh*


/Johan A
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20090207/fe01194b/attachment.html>