JMB363 and hotplugging?

[Dieter]

> > SATA is supposed to support hotplugging, but I tried it with
> > the nforce4-ultra and the kernel (FreeBSD 7.0 amd64) hung. :-(
> 
> Of course you connected disks through a SATA backplane,
> which performs all the management..

Management?  What management?

umount
swapoff (and allow time for i/o)
atacontrol detach
pull sata data cable
observe hung kernel :-(
press reset button :-(