Open Software Solutions

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

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

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:

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:

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

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

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

Back to the top

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

Back to the top