Mounting DVD drive shows error message: AutoSense failed

I have FreeBSD 9.0 stable installed on my desktop. The motherboard is MSI H67MA-E35 which has a H67 Step B3 chipset. SATA is set to AHCI mode.

When I mount my DVD drive for the first time after boot, a error message shows in syslog:

Code:
(cd0:ahcich4:0:0:0): AutoSense failed

It doesn't reproduce after umount then mount again. Does anybody see the same behavior?
 
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