Sunday, January 20, 2013

HARD DRIVE ENABLE Pciide.sys driver - Msahci.sys driver.

http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/win7-64bit-ahci-settings/2bd98154-48a9-4d38-ab5a-2d68eec3eae9?auth=1

http://support.microsoft.com/kb/922976
http://www.intel.com/content/www/us/en/io/serial-ata/serial-ata-faq.html
http://www.sata-io.org/

Symptoms

After you use the BIOS setup of a Windows 7-based computer or a Windows Vista-based computer to change the Serial Advanced Technology Attachment (SATA) mode of the boot drive to use either the Advanced Host Controller Interface (AHCI) specification or redundant array of independent disks (RAID) features, you receive the following error message when the computer is restarted: STOP 0x0000007B INACCESSABLE_BOOT_DEVICE

This issue occurs if the disk driver in Windows 7 or Windows Vista is disabled. This driver must be enabled before you change the SATA/RAID mode of the boot drive.



To resolve this issue yourself, enable the AHCI driver in the registry before you change the SATA mode of the boot drive.

To do this, follow these steps:Exit all Windows-based programs.Click Start, type regedit in the Start Search box, and then press ENTER.If you receive the User Account Control dialog box, click Continue.Locate and then click one of the following registry subkeys:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV

In the pane on the right side, right-click Start in the Name column, and then click Modify

.In the Value data box, type 0, and then click OK.On the File menu, click Exit to close Registry Editor.Back to the top | Give Feedback

More information

Click here to show/hide solution

During the Windows 7 or Windows Vista installation process, any unused storage drivers are disabled.

This behavior speeds up the operating system's startup process. When you change the boot drive to a driver that is disabled, you must enable the new driver before you change the hardware configuration. 

For example, assume that you install Windows Vista or Windows 7 on a computer that contains a controller that uses the Pciide.sys driver.

Later, you change the SATA mode to AHCI. Therefore, the drive must now load the Msahci.sys driver.

However, you must enable the Msahci.sys driver before you make this change. 

This issue affects only the boot drive. If the drive that you change is not the boot drive, you do not experience this issue.

AHCI provides several features for SATA devices. These include hot plug functionality and power management functionality. For more information about the AHCI specification, go to the following Intel website:

http://www.intel.com/technology/serialata/ahci.htm




Advanced Host Controller Interface Specification

Advanced Host Controller interface specification for Serial ATA

The Advanced Host Controller Interface (AHCI) specification describes the register-level interface for a host controller for Serial ATA.

The specification includes a description of the interface between system software and the host controller hardware. This specification is intended for hardware component designers, system builders, and device driver (software) developers.

Implementation

Implementation of the Advanced Host Controller Interface specification requires a license from Intel.

Contributors of the Advanced Host Controller Interface specification for Serial ATA have signed the Advanced Host Controller Interface specification for Serial ATA - contributors agreement in order to be licensed to use and implement this specification. This contributors agreement provides Contributors with a reciprocal, royalty-free license to certain intellectual property rights from Intel and other Contributors for their products that are compliant with the licensed versions of the Advanced Host Controller Interface specification for Serial ATA.Download the Serial ATA AHCI: License Agreement

Refinement and updates

Intel intends to continue including suitable inputs, comments, and suggestions from contributors to refine and update the Advanced Host Controller Interface specification through a series of specification releases that will be marked as being revision 1.x of the specification. Licensing of the applicable final specification of the AHCI Specification (as defined in the contributors agreement) allows the implementation of both discrete and integrated compliant AHCI host controllers. Licensing of the applicable draft version of the applicable specification level (also defined in the contributors agreement) will allow the implementation of compliant, discrete AHCI host controllers only.The latest revision of the specification is revision 1.3. Subsequent revision 1.x levels of the specification will be completed by Intel at its discretion as time and circumstances permit.

Serial ATA Frequently Asked Questions (FAQ)

What is Serial ATA?

Serial ATA is a disk-interface technology developed by a group of the industry's leading vendors to replace parallel ATA.

The group known as the Serial ATA International Organization (SATA-IO) owns the development of the Serial ATA technology and maintenance of its specifications.What are the compelling reas

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