Changes between Version 16 and Version 17 of Howto_ReadSmartctlReports_ATA


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Timestamp:
Jul 15, 2010, 11:36:53 PM (10 years ago)
Author:
Gabriele Pohl
Comment:

explain RAW values

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  • Howto_ReadSmartctlReports_ATA

    v16 v17  
    5757SMART Attributes Data Structure revision number: 10
    5858Vendor Specific SMART Attributes with Thresholds:
    59 ID# <b><a href="TocDoc#SMARTAttributes" title="If your drive is not in the database, the names of the Attributes may be incorrect. Also note that starting with ATA/ATAPI-4, revision 4, the meaning of these Attribute fields have been made /entirely vendor-specific/. We collect info about the SMART attributes in separate wiki pages for the different vendors. Click the link to get there and choose the appropriate one."><font color="blue">ATTRIBUTE_NAME<font></a></b>          FLAG     <b><a href="TocDoc#SMARTAttributes" title="These are /NORMALIZED/ attribute values in the range 1-254. They are calculated by the vendors firmware using his detailed knowledge of the disk's operations and failure mode. Smartmontools only /report/ these."><font color="blue">VALUE<font></a></b> <b><a href="#Worst" title="This is the smallest (/closest to failure/) value that the disk has recorded at any time during its lifetime when SMART was enabled."><font color="browne">WORST</font></a></b> <b><a href="#Thresh" title="Each Attribute also has a Threshold value (whose range is 0 to 255). If the Normalized value (printed in column VALUE) is less than or equal to the Threshold value, then the Attribute is said to have failed. If the Attribute is a pre-failure Attribute, then disk failure is imminent."><font color="red">THRESH</font></a></b> <b><a href="#Attribute_Type" title="Attributes are one of two possible types: /Pre-fail/ or /Old_age/. Pre-failure Attributes are ones which, if less than or equal to their threshold values, indicate pending disk failure. Old age, or usage Attributes, are ones which indicate end-of-product life from old-age or normal aging and wearout, if the Attribute value is less than or equal to the threshold."><font color="DarkGreen">TYPE</font></a></b>      <b><a href="#When_Udated" title="Info in column /UPDATED/ shows if the SMART Attribute values are updated during both normal operation and off-line testing, or only during offline testing. The former are labeled /Always/ and the latter are labeled /Offline/"><font color="DarkGreen">UPDATED</font></a></b>  <b><a href="#When_Failed" title="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."><font color="red">WHEN_FAILED</font></a></b> RAW_VALUE
     59ID# <b><a href="TocDoc#SMARTAttributes" title="If your drive is not in the database, the names of the Attributes may be incorrect. Also note that starting with ATA/ATAPI-4, revision 4, the meaning of these Attribute fields have been made /entirely vendor-specific/. We collect info about the SMART attributes in separate wiki pages for the different vendors. Click the link to get there and choose the appropriate one."><font color="blue">ATTRIBUTE_NAME<font></a></b>          FLAG     <b><a href="TocDoc#SMARTAttributes" title="These are /NORMALIZED/ attribute values in the range 1-254. They are calculated by the vendors firmware using his detailed knowledge of the disk's operations and failure mode. Smartmontools only /report/ these."><font color="blue">VALUE<font></a></b> <b><a href="#Worst" title="This is the smallest (/closest to failure/) value that the disk has recorded at any time during its lifetime when SMART was enabled."><font color="browne">WORST</font></a></b> <b><a href="#Thresh" title="Each Attribute also has a Threshold value (whose range is 0 to 255). If the Normalized value (printed in column VALUE) is less than or equal to the Threshold value, then the Attribute is said to have failed. If the Attribute is a pre-failure Attribute, then disk failure is imminent."><font color="red">THRESH</font></a></b> <b><a href="#Attribute_Type" title="Attributes are one of two possible types: /Pre-fail/ or /Old_age/. Pre-failure Attributes are ones which, if less than or equal to their threshold values, indicate pending disk failure. Old age, or usage Attributes, are ones which indicate end-of-product life from old-age or normal aging and wearout, if the Attribute value is less than or equal to the threshold."><font color="DarkGreen">TYPE</font></a></b>      <b><a href="#When_Udated" title="Info in column /UPDATED/ shows if the SMART Attribute values are updated during both normal operation and off-line testing, or only during offline testing. The former are labeled /Always/ and the latter are labeled /Offline/"><font color="DarkGreen">UPDATED</font></a></b>  <b><a href="#When_Failed" title="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."><font color="red">WHEN_FAILED</font></a></b> <b><a href="#Raw_Value" title="Each Attribute has a /Raw/ value. [Note: smartctl prints these values in base-10.] Vendors use their own algorithms to convert this to a /Normalized/ value in the range from 1 to 254. (See column /Value/"><font color="blue">RAW_VALUE</font></a></b>
    6060  1 Raw_Read_Error_Rate     0x000f   054   051   006    Pre-fail  Always       -       141524796
    6161  3 Spin_Up_Time            0x0003   097   097   000    Pre-fail  Always       -       0
     
    126126<a name="When_Failed"></a><h4>Column "When Failed"</h4>
    127127If the Attribute's current "Normalized value" is less than or equal to the threshold value, then the attribute is marked with "FAILING_NOW" in column WHEN_FAILED.
     128<a name="Raw_Value"></a><h4>Raw Values</h4>
     129Please keep in mind that the conversion from RAW value to a quantity with physical units is not specified by the SMART standard!<br />
     130smartctl only <u>reports</u> the different Attribute types, values, and thresholds as read from the device.
     131It does not carry out the conversion between "Raw" and "Normalized" values: this is done by the disk's firmware.<br />
     132<br />
     133In most cases, the values printed by smartctl are sensible.
     134For example the temperature Attribute generally has its raw value equal to the temperature in Celsius.<br />
     135However in some cases vendors use unusual conventions. For example the Hitachi disk on my laptop reports
     136its power-on hours in minutes, not hours. Some IBM disks track three temperatures rather than one,
     137in their raw values. Have a look at our wiki pages on topic <a href="TocDoc#SMARTAttributes">SMART attributes</a>.
    128138}}}