读取SMART数据-这是什么意思？

Question

看到很多“读取 SMART 数据失败：连接超时-A, --attributes“消息，这可能不寻常。由于某种原因，看起来它们没有被阅读。

无论如何，你不必亲自研究所有数字，你可以尝试使用类似gsmartctrl“smartctl 的图形用户界面”。它有一些特征喜欢：

自动报告并突出显示任何异常；
执行 SMART 自我测试；
显示驱动器身份信息、功能、属性、设备统计信息等...;
可以从保存的文件中读取 smartctl 输出，将其解释为只读虚拟设备；
有详细的帮助信息。

smartctl 的手册页有一些关于 SMART 属性的信息，看起来原始值可能并不总是以明显的方式直接对应于属性，下面是摘录：

          Each  Attribute  has  a  "Raw"  value,  printed  under  the  heading
          "RAW_VALUE",  and  a  "Normalized"  value  printed under the heading
          "VALUE".  [Note: smartctl prints these values in base-10.]   In  the
          example  just  given,  the "Raw Value" for Attribute 12 would be the
          actual number of times that the  disk  has  been  power-cycled,  for
          example  365 if the disk has been turned on once per day for exactly
          one year.  Each vendor uses their  own  algorithm  to  convert  this
          "Raw"  value  to  a  "Normalized"  value in the range from 1 to 254.
          Please keep  in  mind  that  smartctl  only  reports  the  different
          Attribute types, values, and thresholds as read from the device.  It
          does not carry out the conversion  between  "Raw"  and  "Normalized"
          values: this is done by the disk´s firmware.

          The  conversion  from Raw value to a quantity with physical units is
          not specified by the SMART  standard.  In  most  cases,  the  values
          printed  by  smartctl  are  sensible.   For  example the temperature
          Attribute generally has its raw value equal to  the  temperature  in
          Celsius.   However  in  some  cases vendors use unusual conventions.
          For example the Hitachi disk on my laptop reports its power-on hours
          in  minutes,  not  hours.  Some  IBM  disks track three temperatures
          rather than one, in their raw values.  And so on.

...

          Please note: the fact
          that an Attribute is of type 'Pre-fail' does not mean that your disk
          is about to fail!  It only has this meaning if the Attribute´s  cur‐
          rent Normalized value is less than or equal to the threshold value.

...

          If the Attribute´s current Normalized value is less than or equal to
          the threshold value, then  the  "WHEN_FAILED"  column  will  display
          "FAILING_NOW".  If not, but the worst recorded value is less than or
          equal  to  the  threshold  value,  then  this  column  will  display
          "In_the_past".   If the "WHEN_FAILED" column has no entry (indicated
          by a dash: ´-´) then this Attribute is OK now (not failing) and  has
          also never failed in the past.

...

          So to summarize: the Raw Attribute values are the  ones  that  might
          have  a real physical interpretation, such as "Temperature Celsius",
          "Hours", or "Start-Stop Cycles".  Each manufacturer converts  these,
          using  their detailed knowledge of the disk´s operations and failure
          modes, to Normalized Attribute values in the range 1-254.  The  cur‐
          rent  and worst (lowest measured) of these Normalized Attribute val‐
          ues are stored on the disk, along with a Threshold  value  that  the
          manufacturer  has determined will indicate that the disk is going to
          fail, or that it  has  exceeded  its  design  age  or  aging  limit.
          smartctl does not calculate any of the Attribute values, thresholds,
          or types, it merely reports them from the SMART data on the device.

Answer 1

看到很多“读取 SMART 数据失败：连接超时-A, --attributes“消息，这可能不寻常。由于某种原因，看起来它们没有被阅读。

无论如何，你不必亲自研究所有数字，你可以尝试使用类似gsmartctrl“smartctl 的图形用户界面”。它有一些特征喜欢：

自动报告并突出显示任何异常；
执行 SMART 自我测试；
显示驱动器身份信息、功能、属性、设备统计信息等...;
可以从保存的文件中读取 smartctl 输出，将其解释为只读虚拟设备；
有详细的帮助信息。

smartctl 的手册页有一些关于 SMART 属性的信息，看起来原始值可能并不总是以明显的方式直接对应于属性，下面是摘录：

          Each  Attribute  has  a  "Raw"  value,  printed  under  the  heading
          "RAW_VALUE",  and  a  "Normalized"  value  printed under the heading
          "VALUE".  [Note: smartctl prints these values in base-10.]   In  the
          example  just  given,  the "Raw Value" for Attribute 12 would be the
          actual number of times that the  disk  has  been  power-cycled,  for
          example  365 if the disk has been turned on once per day for exactly
          one year.  Each vendor uses their  own  algorithm  to  convert  this
          "Raw"  value  to  a  "Normalized"  value in the range from 1 to 254.
          Please keep  in  mind  that  smartctl  only  reports  the  different
          Attribute types, values, and thresholds as read from the device.  It
          does not carry out the conversion  between  "Raw"  and  "Normalized"
          values: this is done by the disk´s firmware.

          The  conversion  from Raw value to a quantity with physical units is
          not specified by the SMART  standard.  In  most  cases,  the  values
          printed  by  smartctl  are  sensible.   For  example the temperature
          Attribute generally has its raw value equal to  the  temperature  in
          Celsius.   However  in  some  cases vendors use unusual conventions.
          For example the Hitachi disk on my laptop reports its power-on hours
          in  minutes,  not  hours.  Some  IBM  disks track three temperatures
          rather than one, in their raw values.  And so on.

...

          Please note: the fact
          that an Attribute is of type 'Pre-fail' does not mean that your disk
          is about to fail!  It only has this meaning if the Attribute´s  cur‐
          rent Normalized value is less than or equal to the threshold value.

...

          If the Attribute´s current Normalized value is less than or equal to
          the threshold value, then  the  "WHEN_FAILED"  column  will  display
          "FAILING_NOW".  If not, but the worst recorded value is less than or
          equal  to  the  threshold  value,  then  this  column  will  display
          "In_the_past".   If the "WHEN_FAILED" column has no entry (indicated
          by a dash: ´-´) then this Attribute is OK now (not failing) and  has
          also never failed in the past.

...

          So to summarize: the Raw Attribute values are the  ones  that  might
          have  a real physical interpretation, such as "Temperature Celsius",
          "Hours", or "Start-Stop Cycles".  Each manufacturer converts  these,
          using  their detailed knowledge of the disk´s operations and failure
          modes, to Normalized Attribute values in the range 1-254.  The  cur‐
          rent  and worst (lowest measured) of these Normalized Attribute val‐
          ues are stored on the disk, along with a Threshold  value  that  the
          manufacturer  has determined will indicate that the disk is going to
          fail, or that it  has  exceeded  its  design  age  or  aging  limit.
          smartctl does not calculate any of the Attribute values, thresholds,
          or types, it merely reports them from the SMART data on the device.

读取SMART数据-这是什么意思？

答案1

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