1.    30 Jul 2017 #1
    Join Date : Nov 2016
    Tucson, AZ
    Posts : 123
    Wndows 10

    What's the Difference Between chkdsh /r and SFC/ scannow?


    Doesn't SFC/ scannow repair, or attempt to repair, any errors it finds? Computer's running fine, so I don't need to run either one. Just curious. Thanks for helping this geek in training.
      My ComputerSystem Spec
  2.    30 Jul 2017 #2
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,451
    windows 10

    Chkdsk checks the hard disk for errors in the file system bad blocks etc. Sfc checks the windows files to see if they are correct
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  3.    01 Aug 2017 #3
    Join Date : Nov 2016
    Tucson, AZ
    Posts : 123
    Wndows 10
    Thread Starter

    Thanks for the explanation, Samuria. However, don't they both also perform a repair or attempt do do so?
      My ComputerSystem Spec
  4.    01 Aug 2017 #4
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,451
    windows 10

    They both do repairs one for the file structure and sfc for the files them selves
      My ComputerSystem Spec
  5.    04 Aug 2017 #5
    Join Date : Nov 2016
    Tucson, AZ
    Posts : 123
    Wndows 10
    Thread Starter

    Thanks again.
      My ComputerSystem Spec
  6.    06 Aug 2017 #6
    Join Date : Jun 2016
    Los Angeles
    Posts : 1,031
    Windows 10 Pro

    As stated, as Mechanical HDD's age, they get bad sectors and blocks. When you run Check Disk with the /R switch, it scans the HDD, sector by sector (that's why it takes so long) If it finds a bad sector, it will try and move the file to a good sector near by and mark the sector it came from as Bad so Windows won't try to use it again. The longer a scan takes, the more bad sectors you have. if there are too many bad sectors, Check Disk will stall or fail. You then should run the HDD Manufactures Diagnostic program. Check Disk also checks for Orphaned files and removes them or finds their home same as running Check Disk with the /F switch.
    Occasionally thru HDD or file degradation, viruses etc, your Windows files may become corrupted or may become missing. SFC /scannow will look for Windows files that are missing or corrupted and replace them with good system files.
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  7.    09 Aug 2017 #7
    Join Date : Aug 2015
    Brooklyn, NY
    Posts : 268
    Windows 10 Home

    Nothing. They never fix anything.
      My ComputerSystem Spec
  8.    10 Aug 2017 #8
    Join Date : Nov 2016
    Tucson, AZ
    Posts : 123
    Wndows 10
    Thread Starter

    Quote Originally Posted by reddice View Post
    Nothing. They never fix anything.
    Please elaborate. Thanks.
      My ComputerSystem Spec
  9.    11 Aug 2017 #9
    Join Date : Aug 2015
    Brooklyn, NY
    Posts : 268
    Windows 10 Home

    Quote Originally Posted by Mr Ed View Post
    Please elaborate. Thanks.
    Windows Resource Protection did not find any integrity violations. 99% of the time when there is issues.
      My ComputerSystem Spec

 


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