It looks like I have the same problem with https://groups.google.com/forum/#!searchin/comp.os.plan9/usb/comp.os.plan9/dBpkbPyQrzw/0TagYRLa02MJ
usbd is running and I'm getting "usb/disk: /dev/usb: no devs", 2) usbfat: says "can't open /srv/usb: '/srv/usb' file does not exist", and 3) ls #u works (btw why is that important)? Any workarounds? I just want to use a flash/external usb drive to save some files. Networking (if possible on qemu with my eee laptop) is on my future TODO list :)