Creating fast cache on VNX5500

Hello,

Im trying to add two more EFD drives to extend our fast cache.

I have destroyed Fast cache for this, now when trying to use the command :

naviseccli -address 10.149.66.134 cache -fast -create -disks 1_0_0 0_1_0 0_1_1 1_0_1 1_0_2 0_1_2 0_1_3 1_0_3 0_7_10 1_7_12 -mode rw -rtype r_1

I get the error "Security file not found.  Already removed or check -secfilepath option."

trying to create it with the same order of disks as above from the unisphere GUI, will give me error "invalid disk selection". Is there anything Im missing here?

Thanks

Al