pfSense

Some of the old ATA subsystem tunables are still used in loader.conf that should be updated and changed on upgrade. Or we could remove the old tunables and not add the new ones in. If people have been running 2.2 fine without them, perhaps they are not necessary on FreeBSD 10.x like they were in the past on older hardware.

Primarily affects NanoBSD and the default source:boot/loader.conf_wrap

Write caching control:
Old: hw.ata.wc
New: kern.cam.ada.write_cache

Disable DMA:
Old: hw.ata.ata_dma=0 and hw.ata.atapi_dma=0
New: hint.ata.0.mode=PIO4
(Needs set once for each controller, so perhaps put in at least 0-6 to cover the most likely culprits?)