I get them everytime my laptop disk powers up from suspend mode (plus a hang of about 5 or so seconds) Please try the wd fix from my NetBSD Hacks page: http://www.citi.umich.edu/u/rees/netbsd/ If it works, let me know the make and model of notebook computer you have. I'm not running NetBSD any more, so I don't know whether this fix is in -current yet.