This article describes an issue in which Windows Azure virtual machines (VMs) don't recover from a network outage and data corruption occurs in Windows 8.1, Windows RT 8.1, Windows Server 2012 R2, Windows Server 2012, Windows 7 Service Pack 1 (SP1), or Windows Server 2008 R2 SP1. Before you install this update, see the Prerequisites section.
Note This update isn't only restricted to Azure VMs.
Cause
This issue occurs because the SCSI synchronize cache command fails, and the command result isn't checked when VMs handle the FLUSH request.
Note VMs disks should check the result of the synchronize cache command.
How to get this update
Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
Method 1: Windows Update
This update is provided as a Recommended update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.
Method 2: Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
| Operating system | Update |
|---|---|
| All supported x86-based versions of Windows 8.1 |
Download the package now. |
| All supported x64-based versions of Windows 8.1 |
Download the package now. |
| All supported x64-based versions of Windows Server 2012 R2 |
Download the package now. |
| All supported x64-based versions of Windows Server 2012 |
Download the package now. |
| All supported x86-based versions of Windows 7 |
Download the package now. |
| All supported x64-based versions of Windows 7 |
Download the package now. |
| All supported x64-based versions of Windows Server 2008 R2 |
Download the package now. |
| All supported IA-based versions of Windows Server 2008 R2 |
Download the package now. |
Note The update for Windows RT 8.1 can be got only from Windows Update.
For more information about how to download Microsoft support files, select the following article number to view the article in the Microsoft Knowledge Base:
119591 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 prevent any unauthorized changes to the file.
Update detail information
Prerequisites
To install this update, you should first install April 2014, update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) in Windows 8.1 or Windows Server 2012 R2. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2.
Registry information
To apply this update, you don't have to make any changes to the registry.
Restart requirement
You may have to restart the computer after you apply this update.
Update replacement information
This update doesn't replace a previously released update.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
File Information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.
Windows Server 2012
Notes
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:
Version Product Milestone Service branch 6.2.920 0.17xxx Windows Server 2012 RTM GDR 6.2.920 0.21xxx Windows Server 2012 RTM LDR GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very 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.
x64 Windows Server 2012
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.2.9200.17638 | 101,208 | 20-Jan-2016 | 16:08 | x64 |
| Disk.sys | 6.2.9200.21757 | 102,744 | 20-Jan-2016 | 15:41 | x64 |
Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2
Notes
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:
Version Product Milestone Service branch 6.3.960 0.18 xxx Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 RTM GDR GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very 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.
x86 Windows 8.1
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.3.9600.18203 | 83,800 | 20-Jan-2016 | 22:44 | x86 |
x64 Windows 8.1 and Windows Server 2012 R2
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.3.9600.18203 | 99,672 | 20-Jan-2016 | 22:40 | x64 |
Windows RT 8.1
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.3.9600.18203 | 75,624 | 20-Jan-2016 | 22:50 | Not applicable |
Windows 7 and Windows Server 2008 R2
Notes
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:
Version Product Milestone Service branch 6.1.760 1.19xxx Windows 7 or Windows Server 2008 R2 SP1 GDR 6.1.760 1.23 xxx Windows 7 or Windows Server 2008 R2 SP1 LDR GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very 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.
x64 Windows 7 and Windows Server 2008 R2
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.1.7601.19133 | 73,664 | 21-Jan-2016 | 00:51 | x64 |
| Disk.sys | 6.1.7601.23336 | 73,664 | 21-Jan-2016 | 00:51 | x64 |
ia64 Windows Server 2008 R2
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.1.7601.19133 | 136,128 | 21-Jan-2016 | 00:50 | IA-64 |
| Disk.sys | 6.1.7601.23336 | 136,128 | 21-Jan-2016 | 00:52 | IA-64 |
x86 Windows 7
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Disk.sys | 6.1.7601.19133 | 57,280 | 21-Jan-2016 | 00:51 | x86 |
| Disk.sys | 6.1.7601.23336 | 57,280 | 21-Jan-2016 | 00:27 | x86 |
Additional file information
x64 Windows Server 2012
| File property | Value |
|---|---|
| File name | Amd64_disk.inf_31bf3856ad364e35_6.2.9200.17638_none_52ca28f6fdc4a40e.manifest |
| File version | Not applicable |
| File size | 2,090 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 16:12 |
| Platform | Not applicable |
| File name | Amd64_disk.inf_31bf3856ad364e35_6.2.9200.21757_none_533d25a016f36263.manifest |
| File version | Not applicable |
| File size | 2,090 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 16:04 |
| Platform | Not applicable |
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,793 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:28 |
| Platform | Not applicable |
x86 Windows 8.1
| File property | Value |
|---|---|
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,802 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:51 |
| Platform | Not applicable |
| File name | X86_disk.inf_31bf3856ad364e35_6.3.9600.18203_none_8ebb960b8f8655d4.manifest |
| File version | Not applicable |
| File size | 2,089 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:54 |
| Platform | Not applicable |
x64 Windows 8.1 and Windows Server 2012 R2
| File property | Value |
|---|---|
| File name | Amd64_disk.inf_31bf3856ad364e35_6.3.9600.18203_none_eada318f47e3c70a.manifest |
| File version | Not applicable |
| File size | 2,093 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:58 |
| Platform | Not applicable |
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,812 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:51 |
| Platform | Not applicable |
Windows RT 8.1
| File property | Value |
|---|---|
| File name | Arm_disk.inf_31bf3856ad364e35_6.3.9600.18203_none_8ebe08638f83749a.manifest |
| File version | Not applicable |
| File size | 2,089 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:51 |
| Platform | Not applicable |
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,801 |
| Date (UTC) | 20-Jan-2016 |
| Time (UTC) | 22:51 |
| Platform | Not applicable |
x64 Windows 7 and Windows Server 2008 R2
| File property | Value |
|---|---|
| File name | Amd64_disk.inf_31bf3856ad364e35_6.1.7601.19133_none_57d5b2098add6acc.manifest |
| File version | Not applicable |
| File size | 2,073 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 01:17 |
| Platform | Not applicable |
| File name | Amd64_disk.inf_31bf3856ad364e35_6.1.7601.23336_none_58625198a3f853c2.manifest |
| File version | Not applicable |
| File size | 2,073 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 01:17 |
| Platform | Not applicable |
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,940 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 06:17 |
| Platform | Not applicable |
ia64 Windows Server 2008 R2
| File property | Value |
|---|---|
| File name | Ia64_disk.inf_31bf3856ad364e35_6.1.7601.19133_none_fbb8ba7bd27e0292.manifest |
| File version | Not applicable |
| File size | 2,071 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 01:03 |
| Platform | Not applicable |
| File name | Ia64_disk.inf_31bf3856ad364e35_6.1.7601.23336_none_fc455a0aeb98eb88.manifest |
| File version | Not applicable |
| File size | 2,071 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 01:04 |
| Platform | Not applicable |
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,451 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 06:17 |
| Platform | Not applicable |
x86 Windows 7
| File property | Value |
|---|---|
| File name | Update.mum |
| File version | Not applicable |
| File size | 1,928 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 06:17 |
| Platform | Not applicable |
| File name | X86_disk.inf_31bf3856ad364e35_6.1.7601.19133_none_fbb71685d27ff996.manifest |
| File version | Not applicable |
| File size | 2,069 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 01:15 |
| Platform | Not applicable |
| File name | X86_disk.inf_31bf3856ad364e35_6.1.7601.23336_none_fc43b614eb9ae28c.manifest |
| File version | Not applicable |
| File size | 2,069 |
| Date (UTC) | 21-Jan-2016 |
| Time (UTC) | 00:55 |
| Platform | Not applicable |