Current kernels do not support Intel's Smart Response Caching (using a small SSD as cache for rotating metal) We need to see what it will take to support under Linux.
Initial RFC implementation available: kernel: http://marc.info/?l=linux-raid&m=139832034826379&w=2 git://github.com/djbw/linux isrt mdadm: http://marc.info/?l=linux-raid&m=139832414427317&w=2 git://github.com/djbw/mdadm isrt
Looking to close this BZ. When a customer feature request comes in. We can open a new BZ. -Nigel