This article describes an issue in which read operations are slow on files that host on Server Message Block (SMB) shares in Windows 8.1. A hotfix is available to fix this issue. Before you install this hotfix, check out the Prerequisites section.
Resolution
To fix this issue, we have released a hotfix for Windows 8.1 and Windows Server 2012 R2.
Hotfix information
Important If you install a language pack after you install this hotfix, you must reinstall this hotfix. Therefore, we recommend that you install any language packs that you need before you install this hotfix. For more information, see Add language packs to Windows.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get 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 don't 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=supportNote The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you don't see your language, it's because a hotfix isn't available for that language.
Prerequisites
To apply this hotfix, install update 2919355 in Windows 8.1 or Windows Server 2012 R2.
Registry information
To use the hotfix in this package, you don't have to make any changes to the registry.
Restart requirement
You may have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix doesn't replace a previously released hotfix.
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 8.1 and Windows Server 2012 R2 file information and notes
Important Windows 8.1 hotfixes and Windows Server 2012 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's listed under "Windows 8.1/Windows Server 2012 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:
Version
Product
Milestone
Service branch
6.3.960 0.18 xxx
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 separately 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 aren't listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 8.1
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Rdbss.sys |
6.3.9600.18001 |
309,760 |
01-Aug-2015 |
03:37 |
x86 |
|
Mrxsmb20.sys |
6.3.9600.18001 |
153,088 |
01-Aug-2015 |
03:37 |
x86 |
|
Mrxsmb.sys |
6.3.9600.18001 |
328,192 |
01-Aug-2015 |
03:45 |
x86 |
For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Rdbss.sys |
6.3.9600.18001 |
402,944 |
01-Aug-2015 |
03:37 |
x64 |
|
Mrxsmb20.sys |
6.3.9600.18001 |
202,240 |
01-Aug-2015 |
03:37 |
x64 |
|
Mrxsmb.sys |
6.3.9600.18001 |
401,408 |
01-Aug-2015 |
03:48 |
x64 |
Additional file information
Additional file information for Windows 8.1 and for Windows Server 2012 R2
Additional files for all supported x86-based versions of Windows 8.1
|
File property |
Value |
|---|---|
|
File name |
X86_9352733d5c10404e6486e55f41e8ca8c_31bf3856ad364e35_6.3.9600.18002_none_7f694a2e20c420b4.manifest |
|
File version |
Not applicable |
|
File size |
693 |
|
Date (UTC) |
03-Aug-2015 |
|
Time (UTC) |
21:45 |
|
Platform |
Not applicable |
|
File name |
X86_d61fd80cb36713f5aab991407ea2a716_31bf3856ad364e35_6.3.9600.18002_none_1051b955fb9300a8.manifest |
|
File version |
Not applicable |
|
File size |
1,043 |
|
Date (UTC) |
03-Aug-2015 |
|
Time (UTC) |
21:45 |
|
Platform |
Not applicable |
|
File name |
X86_microsoft-windows-rdbss_31bf3856ad364e35_6.3.9600.18002_none_eec8e7dd7cc42e69.manifest |
|
File version |
Not applicable |
|
File size |
22,513 |
|
Date (UTC) |
01-Aug-2015 |
|
Time (UTC) |
16:13 |
|
Platform |
Not applicable |
|
File name |
X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.18002_none_1fcf05aca5209fcb.manifest |
|
File version |
Not applicable |
|
File size |
4,096 |
|
Date (UTC) |
01-Aug-2015 |
|
Time (UTC) |
16:13 |
|
Platform |
Not applicable |
|
File name |
X86_microsoft-windows-smbminirdr_31bf3856ad364e35_6.3.9600.18002_none_14857d466c782df8.manifest |
|
File version |
Not applicable |
|
File size |
95,613 |
|
Date (UTC) |
01-Aug-2015 |
|
Time (UTC) |
16:12 |
|
Platform |
Not applicable |
Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
|
File property |
Value |
|---|---|
|
File name |
Amd64_2cedd8990143c5dd078e185f9ed35b47_31bf3856ad364e35_6.3.9600.18002_none_5978af4863dae90d.manifest |
|
File version |
Not applicable |
|
File size |
1,049 |
|
Date (UTC) |
03-Aug-2015 |
|
Time (UTC) |
21:45 |
|
Platform |
Not applicable |
|
File name |
Amd64_71f86295ae0fcbc36894df2c61ed0188_31bf3856ad364e35_6.3.9600.18002_none_8f454654e47a65dc.manifest |
|
File version |
Not applicable |
|
File size |
697 |
|
Date (UTC) |
03-Aug-2015 |
|
Time (UTC) |
21:45 |
|
Platform |
Not applicable |
|
File name |
Amd64_microsoft-windows-rdbss_31bf3856ad364e35_6.3.9600.18002_none_4ae7836135219f9f.manifest |
|
File version |
Not applicable |
|
File size |
22,519 |
|
Date (UTC) |
01-Aug-2015 |
|
Time (UTC) |
16:58 |
|
Platform |
Not applicable |
|
File name |
Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.18002_none_7beda1305d7e1101.manifest |
|
File version |
Not applicable |
|
File size |
4,100 |
|
Date (UTC) |
01-Aug-2015 |
|
Time (UTC) |
16:58 |
|
Platform |
Not applicable |
|
File name |
Amd64_microsoft-windows-smbminirdr_31bf3856ad364e35_6.3.9600.18002_none_70a418ca24d59f2e.manifest |
|
File version |
Not applicable |
|
File size |
95,617 |
|
Date (UTC) |
01-Aug-2015 |
|
Time (UTC) |
16:58 |
|
Platform |
Not applicable |
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
See the terminology that Microsoft uses to describe software updates.
