there is an interesting UAS/UASP article at on tom's hardware.
ASUS USB 3.0 Boost drivers caused flakiness (this may get fixed later), and the USB firmware update tool v2 maybe bricked my USB 3.0 firmware apparently or the update software is just buggy and it doesn't work. support says I need to have my motherboard replaced (but I need my system too much). funny, my usb 3.0 seems to be working, because I can still type and use my mouse, and my floppy drive works, and hard drives work - the firmware update tool was probably just buggy/broken. I hope a BIOS update fixes this, it could. anandtech forum posts on ASMedia firmware updates
hard drives appear and disappear with the Boost driver I am using in win7. so I uninstalled it or just turned boost off and things became more stable I think.