当我smartctl -s off /dev/sda以管理员权限使用时，SMART 支持被禁用：
C:\Program Files\smartmontools\bin>smartctl -s off /dev/sda
smartctl 6.5 2016-05-07 r4318 [i686-w64-mingw32-win8.1] (sf-6.5-1)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF ENABLE/DISABLE COMMANDS SECTION ===
SMART Disabled. Use option -s with argument 'on' to enable it.
通过使用以下方式确认smartctl -a /dev/sda/：
C:\Program Files\smartmontools\bin>smartctl -a /dev/sda
smartctl 6.5 2016-05-07 r4318 [i686-w64-mingw32-win8.1] (sf-6.5-1)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Hitachi/HGST Travelstar Z5K320
Device Model: Hitachi HTS543232A7A384
Serial Number: E2034243EEG7TP
LU WWN Device Id: 5 000cca 690e24d54
Firmware Version: ES2OA60W
User Capacity: 320,072,933,376 bytes [320 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 5400 rpm
Form Factor: 2.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 6
SATA Version is: SATA 2.6, 3.0 Gb/s
Local Time is: Tue Jan 17 23:10:55 2017 SEAST
SMART support is: Available - device has SMART capability.
SMART support is: Disabled
SMART Disabled. Use option -s with argument 'on' to enable it.
但当我重启电脑时，SMART 检查又回来了。这是为什么？
我的 BIOS 版本是1.31，并且其中没有SMART选项（只有D2D恢复）。