atacontrol reinit ataX does work only sporadically on FreeBSd 8.0-CURRENT/amd64

[O. Hartmann]

Running a box with FreeBSD 8.0-CURRENT #4 r189874.
Try to attach a SATA harddrive via atacontrol. This drive is attached to 
the controller 'ata9' (ICH9 on P35-based board). BIOS has 'AHCI' on all 
controller enabled, so far everything seems to be all right.

Well, I performed 'atacontrol reinit ata9' and 'atacontrol attach ata9' 
once sucessfully, but after detaching, extracting the drive and 
attaching it again this task does not perform successfully anymore.

dmesg shows

ata9: port is not ready (timeout 10000ms)
ata9: port is not ready (timeout 1000ms)
ata9: software reset clear timeout
ata9: port is not ready (timeout 10000ms)
ata9: port is not ready (timeout 10000ms)
ata9: port is not ready (timeout 1000ms)
ata9: software reset clear timeout

Has anyone any idea what's up?

Regards,
Oliver