Hello, Tejun & Robert, On Tue, Jan 19, 2010 at 9:59 PM, Robert Hancock wrote: >>> 2009/12/24 Tejun Heo : >> Hmm.... it worked?  Does kernel parameter sata_nv.adma_enabled=0 make >> any difference?  Can you please attach boot log with the kernel >> parameter specified? > > Think you meant maybe sata_nv.swncq=0 instead - this is an MCP51 > controller so it doesn't support ADMA. I don't imagine SWNCQ would > make any difference with an ATAPI device, but wouldn't hurt to try. Thanks for following this up. I tried both of your suggested kernel parameters (attached). Neither solved my problem, but also it looks like I couldn't turn off the SWNCQ mode. Even though I set it to zero, sata_nv still shows that it uses it. Although the order of my devices changed, so I assume it did something. I hope this helps shed some light! I will also try the kernel patch -- not sure if that is suited for the problem I'm having? -Cengiz -- Cengiz Gunay -- Postdoctoral Fellow Prinz Lab, Dept. of Biology, Emory University 1510 Clifton Rd., Room 2172, Atlanta, GA 30322, U.S.A. cgunay@emory.edu cengique@users.sf.net cengique@yahoo.com Lab: +1-404-727-9381 Home/Cell: +1-678-559-8694 http://userwww.service.emory.edu/~cgunay ICQ# 21104923, cengique@{jabber.org,Skype} --