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
File 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.