Error Message:

WARNING: Converting this drive to NTFS will render it inaccessable to operating systems other than Windows 2000. Do not convert the drive to NTFS if you require access to the drive when using other operating systems such as MS-DOS, Windows, or OS/2. Please confirm that you want to convert drive letter on computer name. To convert the drive to NTFS, press C. To select a different partition for Windows 2000, press ESC.

Explanation:

Do not convert the drive to NTFS if you require access to the drive when using other operating systems such as MS-DOS, Windows, or OS/2.