Multiple controllers and RAIDZ does drive order matter?

[Tekkie]

With 3 controllers:
(A) PCIe 8-port
(B) onboard 4-port
(C) onboard 2-port

When building a RAIDZ3 array does it matter whether the drives are assigned in order?

A1 - A8 B1 - B3

Or is something like this better:

A1 B1 C1 A2 B2 C2 A3 B3 A4 B4 A5

 

[matthewowen01]

with a raidz(2) it does not matter. please note there is no raidz3 in FreeNAS.

if you were doing a mirror however, you would want to do something like this

Code:

zpool create aPool mirror A1 B1 mirror A2 B2 mirror A3 B3 mirror A4 B4 .....

that way if one of your controllers die, you have redundancy across controllers and you won't go down.

 

[joeschmuck]

That is some sound advice on the mirroring.