SCANDISK

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Supported DOS versions:	MS-DOS 6.0+
How easy to use?	Easy
How safe to use?	Moderately dangerous
How common?	Fairly common
Internal or external command?	External

Description

Checks disks for errors and fixes any problems.

Command Syntax

SCANDISK [drive: [drive: ...]|/ALL] [/CHECKONLY | /AUTOFIX [/NOSAVE] | [/CUSTOM] [/SURFACE] [/MONO] [/NOSUMMARY]

/ALL checks all the drives specified.
/CHECKONLY does not fix any errors.
/AUTOFIX automatically fixes errors.
/NOSAVE does not create an undo disk.
/CUSTOM runs SCANDISK according to the settings in the [custom] section of the SCANDISK.INI file.
/SURFACE checks the surface of the disk for errors.
/MONO only displays in black and white.
/NOSUMMARY does not display the summary of what was checked when SCANDISK has finished.

To check an unmounted compressed volume file for errors, use the following syntax:

SCANDISK volume-name [/CHECKONLY | /AUTOFIX [/NOSAVE] | /CUSTOM] [/MONO] [/NOSUMMARY]

To check a file or files for fragmentation, use the following syntax:

SCANDISK /FRAGMENT [drive:][path]filename

To undo repairs you made previously, use the following syntax:

SCANDISK /UNDO [undo-drive:] [/MONO]

Comments

SCANDISK is preferred over CHKDSK as it can fix a greater number of errors and has the option to undo any changes made.

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