Error message when you try to format an unformatted floppy disk: "Windows was unable to complete the format"

Symptoms

When you try to format an unformatted floppy disk by using Windows Explorer in Windows Vista, you receive the following error message:

Format Floppy Disk Drive (A:)

Windows was unable to complete the format

Cause

This problem can occur when a floppy disk is not low-level formatted.

Resolution

To resolve this issue, change the allocation unit size from 512 bytes to Default allocation size.
Properties

Article ID: 982143 - Last Review: Mar 30, 2010 - Revision: 1

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