[IDEA] Moving caches to SDRAM

[aknaggbaugh]

I tried moving /var/cache to RAM and could hear no difference in audio quality on my system (Pi2Design 502DAC Pro feeding 2 Modulus-86 amplifiers which power full range Fostex FE126En drivers in the Fostex suggested hybrid horn/bass reflex cabinets, also Pioneer SE-305s driven straight from the Pi2Design DAC). I'm sticking with it though, purely for SD card wear reasons, as I do find SD card problems to be the most frequent causes of the issues I've had with Raspberry Pis over the years.