Reduces the size of the volume currently with focus by the specified amount. Makes free disk space available from unused space at the end of the volume.

For examples of how this command can be used, see Examples.

Syntax

shrink [desired=<n>] [minimum=<n>] [nowait] [noerr]
shrink querymax [noerr]

Parameters

Parameter Description

desired=<n>

Specifies the desired amount of space in megabytes (MB) to reduce the size of the volume by. If a desired amount is not specified, the volume will be reduced by the maximum amount of free space available on the volume.

minimum=<n>

Specifies the minimum amount of space in MB to reduce the size of the volume by.

querymax

Returns the maximum number of bytes that the volume can be reduced by (the free space available on the volume). This value may change if applications are currently accessing the volume.

nowait

Forces the command to return immediately while the shrink process is still in progress.

noerr

For scripting only. When an error is encountered, DiskPart continues to process commands as if the error did not occur. Without this parameter, an error causes DiskPart to exit with an error code.

Remarks

  • You can reduce the size of a volume only if it is formatted using the NTFS file system or if it does not have a file system.

  • This command works on basic volumes, and on simple or spanned dynamic volumes.

  • If a minimum amount is not specified, the volume will be reduced by either the desired amount (if specified), or by the maximum amount of free space available on the volume.

  • If a minimum amount is specified but not enough free space is available, the command will fail.

  • A volume must be selected for this operation to succeed. Use the select volume command to select a volume and shift the focus to it.

Examples

To reduce the size of the selected volume by the largest possible amount between 250 and 500 megabytes, type:

shrink desired=500 minimum=250

To display the maximum number of bytes that the volume can be reduced by, type:

shrink querymax

Additional references


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