對比了一下自已的筆記本電腦，在Ubuntu Linux 下確實比 Windows 下響很多，當然Windows下讀寫數據時聲音較之要小一點。
查了很多資料終於找到了一個命令 hdparm ，它可以設置很多和硬盤相關的參數，硬盤響聲也可以。
命令的說明如下：
Usage: hdparm [options] [device] ..
Options:
-a get/set fs readahead
-A get/set the drive look-ahead flag (0/1)
-b get/set bus state (0 == off, 1 == on, 2 == tristate)
-B set Advanced Power Management setting (1-255)
-c get/set IDE 32-bit IO setting
-C check drive power mode status
-d get/set using_dma flag
-D enable/disable drive defect management
-E set cd/dvd drive speed
-f flush buffer cache for device on exit
-F flush drive write cache
-g display drive geometry
-h display terse usage information
-H read temperature from drive (Hitachi only)
-i display drive identification
-I detailed/current information directly from drive
-k get/set keep_settings_over_reset flag (0/1)
-K set drive keep_features_over_reset flag (0/1)
-L set drive doorlock (0/1) (removable harddisks only)
-M get/set acoustic management (0-254, 128: quiet, 254: fast) “可以設置聲音 :( ,linux 下居然這也能設置，如果只用windows 永遠也不知道還有這回事啦 :-)
-m get/set multiple sector count
. 省略.........
sudo hdparm -M128 /dev/sda
設置後效果明顯好轉,其它參數有待於再研究了。
由此看來，這聲音還有助於發現硬盤讀寫狀況，和硬盤指示燈功能差不多了。
www-linuxidc-com@www-linuxidc-com:~$ sudo hdparm -M128 /dev/sda
[sudo] password for www-linuxidc-com:
/dev/sda:
setting acoustic management to 128
HDIO_DRIVE_CMD:ACOUSTIC failed: Input/output error
acoustic = not supported
www-linuxidc-com@www-linuxidc-com:~$
