Message at boot time "Liteon CDRW"

[Maggio]

I get this message at boot time for my LiteON CDRW device , on Freebsd 
5.2.1 .

With 4.X series I've never get this message or any other problems with 
the device :

ata1-master: FAILURE - SETFEATURES SET TRANSFER MODE no interrupt
interrupt
acd0: CDRW <LITE-ON LTR-52246S> at ata1-master BIOSPIO


I get this two times when turning back from ACPI Sleep .

Is this normal , what does this means?

Bye

Marcello