What are Targeted Read Test / SMART Short Self Test? What do failures of them mean?

Question

My task is to provide a match when the search term contains the indexed field.

For example:

• If textExactMatch= foo bar and query= foo, I should not get a MATCH
• If textExactMatch= foo bar and query= foo bar, I should get a MATCH
• If textExactMatch= foo bar and query= xyz foo bar/foo bar xyz, I should get a MATCH

I am indexing my field as follows:

<fieldType name="textExactMatch" class="solr.TextField" positionIncrementGap="100">
  <analyzer type="index">
     <tokenizer class="solr.KeywordTokenizerFactory"/>
     <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"/>
     <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
</fieldType>

So I'm indexing the text for the field as it is without breaking it further down. How should I tokenize and filter the field during query time?

Solution 1

SMART = Self-Monitoring, Analysis, and Reporting Technology

SMART errors are the drive detecting errors within itself, regardless of the operating system.

Consider the drive on it's way out, and treat it as such. I.e.: you can keep using it, but don't be surprised when, one day, it's dead. :)

Since it's a Western Digital drive, hit WD's software page and grab their diagnostics software (Data LifeGuard Diagnostics, A.K.A. "WDDiag").

If you can make a bootable CD or USB or floppy, use the DOS version and perform an Extended Test (it's a read-only test).

If you can't make a bootable device try the Windows version, but the DOS version tends to find and correct more issues.

WDDiag will either repair the problem or tell you the drive needs replacing (or tell you nothing's wrong with it). I would expect the extended test to take about an hour to complete on a 500GB drive.

Hope that helps...

Solution 2

chkdsk checks the integrity of the file system, not the hard drive sectors.

a chkdsk /r will do a surface scan of the entire disk and attempt to repair or repair bad sectors it finds, if any.

If you are seeing SMART failures, I would back up your important data and prepare for a hard disk replacement.