Microsoft KB Archive/157332

= Windows NT Hangs with Adaptec 2940 Enable Disconnect Set to No =

Article ID: 157332

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition

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This article was previously published under Q157332



SYMPTOMS
When you start your computer, Windows NT 4.0 may stop responding (hang) at the blue startup screen displaying the system processor and memory configuration. When this occurs, no dots appear on the screen, and you receive no error message. In addition, if you attempt to install Windows NT 4.0 from the 3 floppy diskettes your system may hang on disk 3 while displaying "loading SCSI floppy driver".



CAUSE
This behavior can occur if the Enable Disconnect setting is set to No in the SCSI configuration for the Adaptec 2940 SCSI controller in your computer.



RESOLUTION
Set the Adaptec SCSI controller back to the default settings. To do so, follow these steps:
 * 1) Restart your computer. When the BIOS message for the Adaptec SCSI controller appears on the screen, press CTRL+A to enter the SCSI controller configuration tool.
 * 2) Select SCSI Configuration from the menu.
 * 3) Press F6 to load the default settings.
 * 4) If the boot drive is not SCSI ID 0, go to the SCSI Boot Configuration menu under Additional Options and set the ID to match the drive that is the boot drive.
 * 5) Restart the computer.



MORE INFORMATION
The Adaptec documentation recommends setting the Enable Disconnect setting to No if there is only one drive on the bus to improve performance. The Aic78xx.sys driver requires this setting to be set to Yes.

Additional query words: prodnt

Keywords: kbhardware KB157332

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