[OmniOS-discuss] Debating Swapping 2TB with 4TB drives in RaidZ2 or Create new Vol and clone

[Doug Hughes]

On 3/23/2014 11:53 AM, Bob Friesenhahn wrote:
> On Sun, 23 Mar 2014, Jim Klimov wrote:
>>>
>>> Regardless, I can not imagine why someone would want to replace 2TB
>>> drives with 4TB drives.
>>
>> Limited number of disk bays? ;)
>
> That would be the only reason.  The cost of replacing existing 2TB
> drives with 4TB drives seems pretty high.  Performace would only go
> down, and if the physical block size increases, then storage efficiency
> would decrease.  Disk bays are not necessarily all that expensive as
> long as there is a place nearby to put it.
>
> An existing disk chassis could be replaced with one which supports more
> slots and the existing drives re-used as long as they are physically
> compatible with the new chassis.
>
> Bob

or just they need a lot of capacity for e.g. video or audio media. The 
modest loss of performance would go roughly unnoticed. (home storage, 
for instance)