Hot plugging of SATA disks doesn't seem to work under NetBSD-4.x?

[buhrow%lothlorien.nfbcal.org@localhost (Brian Buhrow)]

        Hello.  I have several Sunfire X2200 boxes with SATA disks attached.
They probe as follows:

viaide1 port 0: device present, speed: 3.0Gb/s
viaide1 port 1: device present, speed: 3.0Gb/s
wd0 at atabus1 drive 0: <ST3320620AS>
wd0: quirks 2<FORCE_LBA48>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 298 GB, 620181 cyl, 16 head, 63 sec, 512 bytes/sect x 625142448
sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd0(viaide1:0:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using
DMA)
wd1 at atabus2 drive 0: <ST3320620AS>
wd1: quirks 2<FORCE_LBA48>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 298 GB, 620181 cyl, 16 head, 63 sec, 512 bytes/sect x 625142448
sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd1(viaide1:1:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using
DMA)
                All works well until one of the drives is reset, either because
it was pulled out and reinserted, or until it was pulled out and another
drive installed.  At that point, timeouts for that drive ensue, and drive
resets fail.

        My questions are:

1.  Are SATA drives supposed to be hot pluggable from a software
perspective, as SCSI disks are?

2.  If not, has anyone looked at what changes are required to make this
functionality work?

3.  If not, can anyone provide direction on what I should pay attention to
if I want to help make that functionality work?

-thanks
-Brian