Symptoms

This issue occurs if the computer uses the StorAHCI driver on non-hybrid Serial Advanced Technology Attachment (SATA) disks.

Cause

This issue occurs because the StorAHCI driver enables the Power-Up in Standby (PUIS) feature for non-hybrid SATA disks. However, the BIOS does not send a spin-up command to the disk that has the PUIS feature enabled.

Resolution

To resolve this issue, we have released an update for Windows 10 Technical Preview or Windows Server Technical Preview.

Windows Update

This update is available from Windows Update.






Update information

Prerequisites

There is no prerequisite to install this update.

Registry information

To apply this update, you do not 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 does not 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.

More Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

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 are not listed, are signed with a Microsoft digital signature.

For all supported 32-bit versions of Windows 10 Technical Preview

File name

File version

File size

Date

Time

Platform

Atapi.sys

6.4.9879.6

23,584

26-Nov-2014

08:25

x86

Ataport.sys

6.4.9879.6

160,280

26-Nov-2014

08:25

x86

Intelide.sys

6.4.9879.6

17,952

26-Nov-2014

08:25

x86

Pciide.sys

6.4.9879.6

14,880

26-Nov-2014

08:26

x86

Pciidex.sys

6.4.9879.6

43,040

26-Nov-2014

08:26

x86

Storahci.sys

6.4.9879.6

100,896

26-Nov-2014

08:26

x86


For all supported 64-bit versions of Windows 10 Technical Preview or Windows Server Technical Preview

File name

File version

File size

Date

Time

Platform

Atapi.sys

6.4.9879.6

28,704

26-Nov-2014

10:19

x64

Ataport.sys

6.4.9879.6

196,640

26-Nov-2014

10:19

x64

Intelide.sys

6.4.9879.6

20,000

26-Nov-2014

10:19

x64

Pciide.sys

6.4.9879.6

16,416

26-Nov-2014

10:19

x64

Pciidex.sys

6.4.9879.6

54,304

26-Nov-2014

10:19

x64

Storahci.sys

6.4.9879.6

121,880

26-Nov-2014

10:19

x64



Additional file information


Additional information for all supported 32-bit versions of Windows 10 Technical Preview

File property

Value

File name

Update.mum

File version

Not applicable

File size

1,578

Date (UTC)

02-Dec-2014

Time (UTC)

22:54

Platform

Not applicable

File name

X86_mshdc.inf_31bf3856ad364e35_6.4.9879.6_none_685ceb89af44250f.manifest

File version

Not applicable

File size

5,261

Date (UTC)

26-Nov-2014

Time (UTC)

08:27

Platform

Not applicable


Additional information for all supported 64-bit versions of Windows 10 Technical Preview or Windows Server Technical Preview

File property

Value

File name

Amd64_mshdc.inf_31bf3856ad364e35_6.4.9879.6_none_c47b870d67a19645.manifest

File version

Not applicable

File size

5,265

Date (UTC)

26-Nov-2014

Time (UTC)

10:24

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,014

Date (UTC)

02-Dec-2014

Time (UTC)

22:54

Platform

Not applicable




About PUISPUIS is a specific hard disk drive (HDD) feature that enables the drive to spin up only when it is necessitated by a command, instead of when turning on the computer. This feature helps save energy or enables staggered spin-up times for multiple disk drives.

References

See the terminology that Microsoft uses to describe software updates.

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