Yes, exactly.

With 6 disks in a mirror configuration, a hot spare would limit you to 2 x 2 
data disks, in which case you might as well use a 3-way mirror for better 
durability.

If space is more important, you could consider a raidz2 with no spare, for 4 
data disks + parity, but low IOPS.

Either way, with 6 disks I see little reason to allocate a hot spare. raidz[1] 
is not usually a good idea with high-capacity disks.

Best,
Chris

> Am 24.03.2014 um 16:48 schrieb Alessio <[email protected]>:
> 
>> On 03/21/2014 07:23 PM, Chris Ferebee wrote:
>> Do you need a hot spare? That would depend, among other things, on how fast 
>> you can replace a failed disk.
>> 
>> With no hot spare, a 2-way mirror will give you up to 3 times the write IOPS 
>> and 3/4 the space.
> 
> Sorry.
> Did you mean something like this?
> 
>        NAME        STATE     READ WRITE CKSUM
>        zones       ONLINE       0     0     0
>          mirror-0  ONLINE       0     0     0
>            c0t0d0  ONLINE       0     0     0
>            c0t1d0  ONLINE       0     0     0
>          mirror-1  ONLINE       0     0     0
>            c0t2d0  ONLINE       0     0     0
>            c0t3d0  ONLINE       0     0     0
>          mirror-2  ONLINE       0     0     0
>            c0t4d0  ONLINE       0     0     0
>            c0t5d0  ONLINE       0     0     0
> 
> 
> 
> 
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