Detail is you need to add ICH7 device ID to your SATA -ICH7 has no hotpluging so OS thinks drives must not be removable (IE its a bodge), you must have method DTGP added as well as this code to your SATA section:

Method (_DSM, 4, NotSerialized)
{
Store (Package (0x02)
{
"device-id",
Buffer (0x04)
{
0x81, 0x26, 0x00, 0x00
}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}