Article ID: 263044 - Last Review: January 27, 2007 - Revision: 3.1 Fdisk Does Not Recognize Full Size of Hard Disks Larger than 64 GBThis article was previously published under Q263044 If this article does not describe your hardware-related
issue, please see the following Microsoft Web site to view more articles about
hardware: http://support.microsoft.com/default.aspx/w98?sid=460
(http://support.microsoft.com/?scid=http%3a%2f%2fsupport.microsoft.com%2fdefault.aspx%2fw98%3fsid%3d460)
SYMPTOMS When you use Fdisk.exe to partition a hard disk that is
larger than 64 GB (64 gigabytes, or 68,719,476,736 bytes) in size, Fdisk does
not report the correct size of the hard disk. The size that Fdisk reports is the full size of the hard disk minus 64 GB. For example, if the physical drive is 70.3 GB (75,484,122,112 bytes) in size, Fdisk reports the drive as being 6.3 GB (6,764,579,840 bytes) in size. CAUSE Fdisk uses some 16-bit values internally to calculate the
size of the drive. Some of these variables overflow when the drive size is
equal to or larger than 64 GB. RESOLUTIONA
supported fix is now available from Microsoft, but it is only intended to
correct the problem that is described in this article. Apply it only to
computers that are experiencing this specific problem. To resolve this problem immediately, download the fix by clicking the download link later in this article or contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
(http://support.microsoft.com/default.aspx?scid=fh;en-us;cntactms)
NOTE: In special cases, charges that are ordinarily incurred for
support calls may be canceled if a Microsoft Support Professional determines
that a specific update will resolve your problem. The usual support costs will
apply to additional support questions and issues that do not qualify for the
specific update in question.NOTE: This hotfix is not designed for 48-bit logical block addressing (LBA) hard disks, and it is not supported on hard disks larger than 137 GB. The English version of this fix should have the following file attributes or later: Date Time Size File name Operating System --------------------------------------------------------------- 05/19/00 10:30am 64,428 Fdisk.exe Windows 98 05/18/00 8:35am 64,460 Fdisk.exe Windows 98 Second Edition The following files are available for download from the Microsoft Download Center: Collapse this image  Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image Collapse this image 119591
(http://support.microsoft.com/kb/119591/EN-US/
)
How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most
current virus-detection software that was available on the date that the file
was posted. The file is stored on security-enhanced servers that help to
prevent any unauthorized changes to the file.
STATUSMicrosoft
has confirmed that this is a problem in the Microsoft products that are listed
at the beginning of this article.
This problem was corrected in Microsoft Windows Millennium Edition. MORE INFORMATION This package installs the updated Fdisk.exe to the
Windows\Command and Windows\Options\Cabs folders, on a computer running Windows
98 or Windows 98 Second Edition. If you are starting a computer from a Windows
98 Startup Disk in order to partition and format the hard disk, you should copy
the updated Fdisk.exe from the Windows\Command folder to the Startup Disk,
replacing the original Windows 98 or Windows 98 Second Edition version of
Fdisk.exe on the Startup Disk. For additional information on issues with hard drives larger than 64GB, click the article number below to view the article in the Microsoft Knowledge Base: 263045
(http://support.microsoft.com/kb/263045/EN-US/
)
Format Displays Size of Drives Larger Than 64 GB Incorrectly
There is no fix available for any version of
Windows 95. For additional information, please see the following article in the
Microsoft Knowledge Base:
246818
(http://support.microsoft.com/kb/246818/EN-US/
)
Windows 95 Does Not Support Hard Disks Larger Than 32 GB
For additional information about Windows 98 and Windows 98
Second Edition hotfixes, click the article number below to view the article in
the Microsoft Knowledge Base: 206071
(http://support.microsoft.com/kb/206071/EN-US/
)
General Information About Windows 98 and Windows 98 Second Edition Hotfixes
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