The size of the GUID partition table (GPT) disk is not updated on a Windows Vista-based computer after you use a disk management program to expand a logical unit number (LUN)

The size of the GUID partition table (GPT) disk is not updated on a Windows Vista-based computer after you use a disk management program to expand a logical unit number (LUN)

Article ID : 950927
Last Review : May 15, 2008
Revision : 1.0
On This Page

SYMPTOMS

Consider the following scenario:

• You are running a Windows Vista-based computer.
• To provide additional space on the computer’s hard disk, you run a disk management program to expand the size of a logical unit number (LUN).

In this scenario, the LUN size is not updated after you run the disk management program. This issue occurs if you use a computer that includes GUID partition table (GPT) disks.

Note A master boot record (MBR) disk does not experience this issue.

Back to the top

CAUSE

The Partmgr.sys system drive expands the size of a LUN on a GPT disk by forwarding IOCTL_DISK_GET_DRIVE_GEOMETRY_EX control code instead of the IOCTL_DISK_GET_PARTITION_INFO_EX control code that is used with an MBR disk. However, the IOCTL_DISK_GET_DRIVE_GEOMETRY_EX control code does not provide the updated information about the LUN size. Therefore, this issue occurs only with GPT disks.

Back to the top

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451 (http://go.microsoft.com/?linkid=6294451)

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

Prerequisites

To apply this hotfix, you must have Windows Vista Service Pack 1 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Vista, x86-based versions
File name File version File size Date Time Platform
Package_1_for_kb950927~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,777 07-May-2008 23:53 Not Applicable
Package_2_for_kb950927~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,944 07-May-2008 23:53 Not Applicable
Package_3_for_kb950927~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,782 07-May-2008 23:53 Not Applicable
Package_4_for_kb950927~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,782 07-May-2008 23:53 Not Applicable
Package_for_kb950927_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,367 07-May-2008 23:53 Not Applicable
Package_for_kb950927_client~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,431 07-May-2008 23:53 Not Applicable
Package_for_kb950927_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,421 07-May-2008 23:53 Not Applicable
Package_for_kb950927_sc~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,423 07-May-2008 23:53 Not Applicable
Package_for_kb950927_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,425 07-May-2008 23:53 Not Applicable
Package_for_kb950927_server~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,431 07-May-2008 23:53 Not Applicable
Package_for_kb950927_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,422 07-May-2008 23:53 Not Applicable
Package_for_kb950927_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum Not Applicable 1,429 07-May-2008 23:53 Not Applicable
Update.mum Not Applicable 3,077 07-May-2008 23:53 Not Applicable
X86_499a95cb559453eca465400ccb491cc0_31bf3856ad364e35_6.0.6001.22174_none_38e5b90ad50181a7.manifest Not Applicable 697 07-May-2008 23:53 Not Applicable
X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.0.6001.22174_none_6c72501fcd75db25.manifest Not Applicable 17,806 07-May-2008 03:49 Not Applicable
Ntkrnlpa.exe 6.0.6001.22174 3,601,464 07-May-2008 03:23 Not Applicable
Ntoskrnl.exe 6.0.6001.22174 3,549,240 07-May-2008 03:23 Not Applicable
Windows Vista, x64 versions
File name File version File size Date Time Platform
Amd64_4dbdf1ab5e784bcd632342e66c28f05b_31bf3856ad364e35_6.0.6001.22174_none_ee2f0d96632013ab.manifest Not Applicable 701 07-May-2008 23:53 Not Applicable
Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.0.6001.22174_none_c890eba385d34c5b.manifest Not Applicable 16,512 07-May-2008 05:00 Not Applicable
Package_1_for_kb950927~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,787 07-May-2008 23:53 Not Applicable
Package_2_for_kb950927~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,956 07-May-2008 23:53 Not Applicable
Package_3_for_kb950927~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,792 07-May-2008 23:53 Not Applicable
Package_4_for_kb950927~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,792 07-May-2008 23:53 Not Applicable
Package_for_kb950927_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,375 07-May-2008 23:53 Not Applicable
Package_for_kb950927_client~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,439 07-May-2008 23:53 Not Applicable
Package_for_kb950927_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,429 07-May-2008 23:53 Not Applicable
Package_for_kb950927_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,431 07-May-2008 23:53 Not Applicable
Package_for_kb950927_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,433 07-May-2008 23:53 Not Applicable
Package_for_kb950927_server~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,439 07-May-2008 23:53 Not Applicable
Package_for_kb950927_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,430 07-May-2008 23:53 Not Applicable
Package_for_kb950927_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum Not Applicable 1,437 07-May-2008 23:53 Not Applicable
Update.mum Not Applicable 3,099 07-May-2008 23:53 Not Applicable
Ntoskrnl.exe 6.0.6001.22174 4,694,584 07-May-2008 04:03 x64
Windows Vista, IA-64 versions
File name File version File size Date Time Platform
Ia64_1694d5515e31de8b861141fc2c103d81_31bf3856ad364e35_6.0.6001.22174_none_ac7d85e510fc5a94.manifest Not Applicable 699 07-May-2008 23:53 Not Applicable
Ia64_microsoft-windows-os-kernel_31bf3856ad364e35_6.0.6001.22174_none_6c73f415cd73e421.manifest Not Applicable 16,819 07-May-2008 04:32 Not Applicable
Package_1_for_kb950927~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,782 07-May-2008 23:53 Not Applicable
Package_2_for_kb950927~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,787 07-May-2008 23:53 Not Applicable
Package_3_for_kb950927~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,787 07-May-2008 23:53 Not Applicable
Package_for_kb950927_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,425 07-May-2008 23:53 Not Applicable
Package_for_kb950927_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,426 07-May-2008 23:53 Not Applicable
Package_for_kb950927_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,429 07-May-2008 23:53 Not Applicable
Package_for_kb950927_server~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,434 07-May-2008 23:53 Not Applicable
Package_for_kb950927_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,426 07-May-2008 23:53 Not Applicable
Package_for_kb950927_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum Not Applicable 1,433 07-May-2008 23:53 Not Applicable
Update.mum Not Applicable 2,423 07-May-2008 23:53 Not Applicable
Ntoskrnl.exe 6.0.6001.22174 9,501,752 07-May-2008 03:57 IA-64

Back to the top

MORE INFORMATION

For more information about IOCTL_DISK_GET_PARTITION_INFO_EX control code, visit the following Microsoft Web site:

http://msdn.microsoft.com/en-us/library/aa365180(VS.85).aspx (http://msdn.microsoft.com/en-us/library/aa365180(VS.85).aspx)

For more information about IOCTL_DISK_GET_DRIVE_GEOMETRY_EX control code, visit the following Microsoft Web site:

http://msdn.microsoft.com/en-us/library/aa365171(vs.85).aspx (http://msdn.microsoft.com/en-us/library/aa365171(vs.85).aspx)

Back to the top

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the Applies to section.

Back to the top


APPLIES TO
• Windows Vista Business
• Windows Vista Enterprise
• Windows Vista Home Basic
• Windows Vista Home Premium
• Windows Vista Starter
• Windows Vista Ultimate
• Windows Vista Business 64-bit Edition
• Windows Vista Enterprise 64-bit Edition
• Windows Vista Home Basic 64-bit Edition
• Windows Vista Home Premium 64-bit Edition
• Windows Vista Ultimate 64-bit Edition

Back to the top

Keywords: 
kbexpertiseadvanced kbhotfixserver kbqfe KB950927

Back to the top

 

Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
Microsoft Corporation. All rights reserved. Terms of Use | Trademarks


You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

AddThis Social Bookmark Button

Leave a Reply

*
To prove that you're not a bot, enter this code
Anti-Spam Image