It's not closed source technically, but it is a little suspect at the very least. It's not violating GPL, but we should be striving for better than the bare minimum.

@Revan343 @Unimeron
The ATA specification takes the values that way. https://people.freebsd.org/~imp/asiabsdcon2015/works/d2161r5-ATAATAPI_Command_Set_-_3.pdf