I notices some system sluggishness under the following conditions:
Disk 1 is a HW RAID-0 array on an Areca controller, and very fast (4 Samsung 830 256GB SSDs). No FC.
Disk2 is a standard WS 2TB WDEARX disk with 5GB of FC with writeback on Intel mobo controller.
When doing a large (200+GB) copy from the RAID array to disk 2, naturally the reading is much faster than the writing, and the FC write cache fills up on disk 2. At this point the response of the system becomes very sluggish. Mouse is jerky, apps don't respond smoothly.
Anyone else seen this?