Incorrect available space is displayed in a Linux Hyper-V virtual machine on a Windows Server 2008 R2-based computer

Article translations Article translations
Article ID: 2711771 - View products that this article applies to.
Expand all | Collapse all

On This Page

SYMPTOMS

Consider the following scenario:
  • You install the Hyper-V server role on a computer that is running Windows Server 2008 R2.
  • You install Linux on a Hyper-V virtual machine on the computer.
  • You attach a virtual hard disk (VHD) that is larger than 127 gigabytes (GB)  to the Hyper-V virtual machine.
In this scenario, Linux displays only 127 GB of available space.

CAUSE

This issue occurs because Hyper-V cannot set bits in the LBA48 code.

RESOLUTION

Hotfix information

A supported hotfix is 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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running Windows Server 2008 R2 or Windows Server 2008 R2 Service Pack 1 (SP1). Additionally, you must have the Hyper-V server role installed.

For more information about how to obtain a Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply this hotfix, you do not have to change the registry.

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 global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.20xxxWindows Server 2008 R2RTMLDR
    6.1.760 1.21xxxWindows Server 2008 R2SP1LDR
  • The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2" section. MANIFEST files and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Vmwp.exe6.1.7600.212103,593,21609-May-201203:18x64
Vmwp.exe6.1.7601.219903,682,81609-May-201203:13x64

STATUS

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

MORE INFORMATION

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_c28ea01ee41f6ef5aeecbd2e1cf02d80_31bf3856ad364e35_6.1.7600.21210_none_3cf60a64df449ac7.manifest
File versionNot applicable
File size703
Date (UTC)09-May-2012
Time (UTC)09:57
PlatformNot applicable
File nameAmd64_d535617d991e3ad8ae382b3c7b46b4e6_31bf3856ad364e35_6.1.7601.21990_none_fe40fc9a3f7a7c07.manifest
File versionNot applicable
File size703
Date (UTC)09-May-2012
Time (UTC)09:57
PlatformNot applicable
File nameAmd64_microsoft-hyper-v-vstack-vmwp_31bf3856ad364e35_6.1.7600.21210_none_9205b02692632beb.manifest
File versionNot applicable
File size256,418
Date (UTC)09-May-2012
Time (UTC)06:07
PlatformNot applicable
File nameAmd64_microsoft-hyper-v-vstack-vmwp_31bf3856ad364e35_6.1.7601.21990_none_9395b5aa8fca441d.manifest
File versionNot applicable
File size276,830
Date (UTC)09-May-2012
Time (UTC)06:08
PlatformNot applicable

Properties

Article ID: 2711771 - Last Review: June 13, 2012 - Revision: 1.0
APPLIES TO
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Standard
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbexpertiseadvanced kbsurveynew KB2711771

Give Feedback

 

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from smallbusiness.support.microsoft.com