trying atausb instead of umass

[Dieter]

FreeBSD 7.0 amd64

Deleted device umass and added atausb instead.

The bridge shows up, but the disk does not. (sata hard drive,
not a CD/DVD drive)
atausb0: <JMicron USB to ATA/ATAPI Bridge, class 0/0, rev 2.00/1.00, addr 2> on uhub1

The kernel moved the chipset-connected SATA drives from ad4,6,8,10 to ad6,8,10,12
despite:
options         ATA_STATIC_ID   # Static device numbering

Should I expect the USB disk to show up as ad* or is there some
other device name I need to add to the config file?  Is there
anything else I need to change in the config file besides comment
out umass and add atausb?

How do I get (non-USB) device names to really stay put?