hdparm的结果让我迷糊了,我这硬盘是否是支持APM?

[科学之子]

hdparm的结果让我迷糊了,我这硬盘是否是支持APM?
貌似显示支持:

代码： 全选

# hdparm -I /dev/sda |grep -i power
	   *	Power Management feature set

但这么查就显示不支持了?

代码： 全选

# hdparm -B /dev/sda 

/dev/sda:
 APM_level	= not supported

Power Management feature set
前面没有"Advanced",看来指的是那个"-S"?

[vickycq]

支持 APM 的输出

代码： 全选

# hdparm -I /dev/sda | grep -i power
        Advanced power management level: 254
           *    Power Management feature set
           *    Advanced Power Management feature set
                Power-Up In Standby feature set
           *    SET_FEATURES required to spinup after power up
           *    Host-initiated interface power management
                Device-initiated interface power management

[科学之子]

支持 APM 的输出

代码： 全选

# hdparm -I /dev/sda | grep -i power
        Advanced power management level: 254
           *    Power Management feature set
           *    Advanced Power Management feature set
                Power-Up In Standby feature set
           *    SET_FEATURES required to spinup after power up
           *    Host-initiated interface power management
                Device-initiated interface power management

hdparm是什么版本?
我这里:

代码： 全选

# hdparm -V
hdparm v9.43

"hdparm -I"连未支持APM的字样都没有