linux下的smart服务

smartd是一个守护进程（一个帮助程序），它能监视拥有自我监视，分析和汇报技术(Self-Monitoring,


Analysis, and Reporting Technology - SMART)的硬盘。

SMART系统使得硬盘能监视并汇报自己的运行状况。它的一个重要特性是能够预测失败，使得系统管理员能避免数据丢失。

smartd由kernel-utils包缺省安装。用命令 rpm -ql kernel-utils 可以列出kernel-utils包中的文件。

smartd守护进程通常在系统启动的时候被开启，它的配置文件是/etc/smartd.conf。

比如，假设有两个硬盘被安装，/dev/hda和/dev/hdb。一个是CD_ROM设备，另一个是硬盘。为了检测它们

是否支持SMART，使用命令 smartctl -i /dev/hda 和 smartctl -i /dev/hdb：

# [root@fedora13 down]# smartctl -i /dev/sda
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Blue Serial ATA family
Device Model:     WDC WD3200AAJS-00L7A0
Serial Number:    WD-WMAV2C811415
Firmware Version: 01.03E01
User Capacity:    320,071,851,520 bytes
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Fri Sep  3 11:30:53 2010 CST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled


”SMART support is: Available - device has SMART capability.“这行说明支持SMART。"SMART

support is: Enabled”这行说明SMART已经被打开。

CD-ROM设备和旧式的硬盘不支持SMART，这可以从smartctl -i /dev/hdb的输出看出：[root@fedora13 down]# smartctl -i /dev/sr1
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

Device: PHILIPS  SPD2214T         Version: P1.2
Device type: CD/DVD
Local Time is: Fri Sep  3 11:41:25 2010 CST
NO MEDIUM present on device
A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options.
[root@fedora13 down]# smartctl -i -T permissive /dev/sr1
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

Device: PHILIPS  SPD2214T         Version: P1.2
Device type: CD/DVD
Local Time is: Fri Sep  3 11:41:57 2010 CST
NO MEDIUM present on device
Device does not support SMART
[root@fedora13 down]# smartctl -i -T permissive /dev/sr0
smartctl 5.39.1 2010-01-28 r3054 [i386-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

Device: PHILIPS  SPD2417T         Version: P1.0
>> Terminate command early due to bad response to IEC mode page


注意有些硬盘控制器不支持SMART。比如有些硬件RAID控制器不支持，或者不会传递SMART信息，即使加入

的硬盘支持SMART。

可以修改/etc/smartctl.conf文件，使得smartd只监视你想监视的设备。假设只有/dev/hda需要被监视，

在该设备上如果有警告信息发生，需要把它发给根用户，那么/etc/smartd.conf需要这样修改：

# /etc/smartd.conf

# Sample configuration file for smartd.  See man 5 smartd.conf.
# Home page is: http://smartmontools.sourceforge.net
...
# A very silent check.  Only report SMART health status if it fails
# But send an email in this case
/dev/hda -a -m [email protected] ...

编辑完/etc/smartd.conf，重启该守护进程：
# /sbin/service smartd restart
Shutting down smartd:                                      [FAILED]
Starting smartd:                                           [  OK  ]

要设置smartd在系统启动时候被激活，在根用户下用 chkconfig smartd on 命令。

关闭smartd服务自动启动
root LINUX smartd  is a daemon that monitors the Self-Monitoring, Analysis and Reporting

Technology (SMART) system built
      into many ATA-3 and later ATA, IDE and SCSI-3 hard drives. The purpose of SMART is to

monitor the reliability
      of  the  hard  drive  and predict drive failures, and to carry out different types of

drive self-tests.  This
      version of smartd is compatible with ATA/ATAPI-7 and earlier standards
简单地说，smartd是监控硬盘的可靠性并预测其失败、进行测试的守护进程！
仔细看看smartd的说明即可！（man smartd）
＃chkconfig smartd off
这是关闭smartd服务自动启动，机器重新启动时smartd不再运行！