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    PC Commands: Copy, Xcopy, Chkdsk, Scandisk

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    Explain the difference between the Copy command and the Xcopy command. Explain the difference between the Chkdsk and Scandisk commands.

    © BrainMass Inc. brainmass.com December 24, 2021, 7:08 pm ad1c9bdddf
    https://brainmass.com/computer-science/user-interface/pc-commands-copy-xcopy-chkdsk-scandisk-165952

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    * The COPY command is an internal command. It comes built-in to Command.Com and gets loaded up when Command.Com loads. You don't have to do anything - it is available by virtue of the computer being turned on.
    Link: http://www.melbpc.org.au/pcupdate/9200/9207article3.htm

    * XCOPY is a PC command used for copying multiple files from one directory to another or across a network. XCOPY stands for extended copy, and was created as a more functional file copying utility than the copy tool found in MS-DOS.
    Microsoft has A HUGE REFERENCE of information about these copy commands and their syntax and parameters. See:
    http://technet.microsoft.com/en-us/library/bb490886.aspx

    * According to Microsoft, "When you use the ScanDisk for Windows (Scandskw.exe) disk-checking and repair tool, you can check the integrity of your media (which includes hard disks and floppy disks), and repair most problems that may occur. Type of Test
    ? Standard: Use this option to check files and folders for errors.
    ? Thorough: Use this option to perform the Standard test and also scan your disk for physical errors. ScanDisk may take a long time to check your disk for errors depending on the size of your disk. If you use the Thorough option, the following ScanDisk configuration settings are available when you click Option." See this link for full info about what ScanDisk can do: http://support.microsoft.com/kb/186365

    * According to Microsoft again, Chkdsk "Checks the file system and file system metadata of a volume for logical and physical errors. If used without parameters, chkdsk displays only the status of the volume and does not fix any errors. If used with the /f, /r, /x, or /b parameters, it fixes errors on the volume. Chkdsk.exe is the command-line interface for a program that verifies the logical integrity of a file system on Windows. When CHKDSK encounters logical inconsistencies it takes actions to repair file system data, provided it is not in read-only mode.

    The code that actually performs the verification when CHKDSK is run online resides in utility DLLs such as Untfs.dll and Ufat.dll. The verification routines invoked by Chkdsk.exe are the same ones invoked when a volume is verified through the graphical user interface provided by the Windows Explorer or Disk Administrator. When CHKDSK is scheduled to run at reboot, on the other hand, the binary module that contains the verification code is Autochk.exe. Autochk.exe is a native Windows application that runs early enough in the system boot sequence that it does not have the benefit of Virtual Memory or other Win32 services. Autochk.exe generates the same kind of textual output that the utility DLLs invoked by Chkdsk.exe does. But in addition to displaying this output on the screen during the boot process, Autochk.exe also logs an event to the Application Event Log for the system containing as much of the textual output as can fit into the event log's data buffer.

    Because Autochk.exe and the verification code in the utility DLLs used by Chkdsk.exe are based on the same source code, both will be referred to generically as "CHKDSK" throughout the remainder of this article.
    See: http://support.microsoft.com/kb/187941/en-us

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

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    https://brainmass.com/computer-science/user-interface/pc-commands-copy-xcopy-chkdsk-scandisk-165952

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