ZFS / zpool size

[Shawn Webb]

shawn at indianapolis:~$ pfexec format
Searching for disks...done

AVAILABLE DISK SELECTIONS:
       0. c1d0 <WDC WD30-  WD-WCAWZ084341-0001-2.73TB>
          /pci at 0,0/pci-ide at 11/ide at 0/cmdk at 0,0
       1. c1d1 <WDC WD30-  WD-WCAWZ087742-0001-2.73TB>
          /pci at 0,0/pci-ide at 11/ide at 0/cmdk at 1,0
       2. c2d0 <Unknown-Unknown-0001 cyl 30397 alt 2 hd 255 sec 63>
          /pci at 0,0/pci-ide at 11/ide at 1/cmdk at 0,0
       3. c2d1 <ST315003-         9VS25XB-0001-1.36TB>
          /pci at 0,0/pci-ide at 11/ide at 1/cmdk at 1,0
       4. c4d0 <Unknown-Unknown-0001 cyl 30397 alt 2 hd 255 sec 63>
          /pci at 0,0/pci-ide at 14,1/ide at 1/cmdk at 0,0
Specify disk (enter its number): ^C
shawn at indianapolis:~$ zpool status tank
  pool: tank
 state: ONLINE
  scan: scrub repaired 0 in 4h53m with 0 errors on Tue Dec 20 12:03:36 2011
config:

        NAME        STATE     READ WRITE CKSUM
        tank        ONLINE       0     0     0
          raidz1-0  ONLINE       0     0     0
            c1d0    ONLINE       0     0     0
            c1d1    ONLINE       0     0     0
            c2d1    ONLINE       0     0     0

errors: No known data errors

On Tue, Jan 17, 2012 at 9:18 AM, Tom Evans <tevans.uk at googlemail.com> wrote:
> On Tue, Jan 17, 2012 at 4:00 PM, Christer Solskogen
> <christer.solskogen at gmail.com> wrote:
>> A overhead of almost 300GB? That seems a bit to much, don't you think?
>> The pool consist of one vdev with two 1,5TB disks and one 3TB in raidz1.
>>
>
> Confused about your disks - can you show the output of zpool status.
>
> If you have a raidz of N disks with a minimum size of Y GB, you can
> expect ``zpool list'' to show a size of N*Y and ``zfs list'' to show a
> size of roughly (N-1)*Y.
>
> So, on my box with 2 x 6 x 1.5 TB drives in raidz, I see a zpool size
> of 16.3 TB, and a zfs size of 13.3 TB.
>
> Cheers
>
> Tom