Device Driver Does Not Start on Windows Server 2003 if the Medium Changer Device or the Autoloader Device Is Attached to an Adaptec Ultra 160 SCSI Controller

When you install a medium changer device or an autoloader device on a computer that is running Windows Server 2003, the driver for the device loads and an entry appears in Device Manager under Medium Changers. However, the device entry is marked with a yellow exclamation mark icon. On the General tab of Device Properties, the status for this device appears as follows: This problem occurs if the medium changer device or the autoloader device is attached to an Adaptec Ultra 160 small computer system interface (SCSI) controller card (such as the ASC-29160 Host Adapter).

This problem occurs because the inbox driver (Adpu160m.sys) for the Adaptec Ultra 160 SCSI controller in Windows Server 2003 does not allow sufficient time for the medium changer device or the autoloader device to respond to the initialization sequence. A timeout condition occurs that causes the device driver to report an error to Device Manager.

To resolve this problem, contact Adaptec to obtain an updated Ultra 160 SCSI device driver that correctly supports medium changers devices and autoloader devices.

For information about how to contact Adaptec, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:
An updated driver that has been confirmed to fix this issue is identified by Adaptec as �Ultra 160 Family Manager Set 4.0 SP5 for Windows 2000 and Server 2003.� To download this driver, visit the following Adaptec Web site: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

The Adaptec Ultra 160 SP5 driver that fixes this problem is not supported for use with an ASC-19160 SCSI controller card. If you are attaching a medium changer device or an autoloader device to an ASC-19160 controller card, and you experience the problem that this article describes, do one of the following:

�	Replace the ASC-19160 controller card with a SCSI controller that the SP5 driver supports. -or-
�	Replace the ASC-19160 controller card with a SCSI controller that does not experience this problem.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.