+#define ATA_SECURITY_FREEZE_LOCK 0xf5
+#define ATA_SET_FEATURES 0xef
+#define ATA_STANDBY_IMMEDIATE 0xe0
+
+// SET_FEATURES subcommands
+#define ATA_DISABLE_AAM 0xc2
+#define ATA_DISABLE_APM 0x85
+#define ATA_DISABLE_WRITE_CACHE 0x82
+#define ATA_DISABLE_READ_LOOK_AHEAD 0x55
+#define ATA_ENABLE_AAM 0x42
+#define ATA_ENABLE_APM 0x05
+#define ATA_ENABLE_WRITE_CACHE 0x02
+#define ATA_ENABLE_READ_LOOK_AHEAD 0xaa
+