Hard Drives -- RAID controller cache ?

[3cxUsers]

My 3CX server Dell PowerEdge T630 server has lots
of memory, but a PERC H330 which has no CACHE per
http://www.dell.com/learn/us/en/04/campaigns/dell-raid-controllers

http://downloads.3cx.com/downloads/3CX_Phone_System_Operating_System_Specifications.pdf
does not say anything about how much CACHE a RAID 5 controller should have.

Does anyone have a RAID 5 controller CACHE
size recommendation for 16 concurrent calls ?

 

[eagle2]

Should not be important, any size of cache or no cache at all is fine for almost any size of 3CX and completely irrelevant for 16SC, even recording all calls simultaneously. The network load will not exceed 0.5% typically.