[OpenIndiana-discuss] Formula raidz storage space caclulation

[PÁSZTOR György]

Hi,

"Randy S" <sim.ple at live.nl> írta 2014-04-08 16:16-kor:
> The information that I have about the formula to use is (n-1) x storage space per disk
> n=number of disks 
> 1=is de disk used for parity in a raidz1 configuration.
> In the case of Raidz2 , this number would be 2 (n-2) x space.
> 
> My question is: is this formula correct?
> Reason, my outcome always differs with from the outcome on the following website: http://www.servethehome.com/raid-calculator/
> What would be the correct formula to use?

Did you count in your calculations what the manufacturers cheat on the
meaning of kilo (1024 vs 1000)?
They also note that:
"
*Usable storage is the actual post-format amount where kilo = 1024, not
1000
"

Regards,
György