Cannot Gain Access to a Device on Windows 2000-Based Computer (277997)

The information in this article applies to:

Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Professional SP1

This article was previously published under Q277997

SYMPTOMS

When you try to use a device on a computer that is running Windows 2000, you may have trouble gaining access to the device.

CAUSE

This behavior can occur when devices that are managed through the Scsiport.sys file are shut down at the same time. This causes the logical unit number (LUN) information not to be detected properly. When Plug and Play tries unsuccessfully to identify the device, it returns a repetitive timeout report, and then you cannot gain access to the device.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes or later:

   Date        Time    Version        Size    File name
   -------------------------------------------------------
   11/03/2000  09:57p  5.0.2195.2645  72,688  scsiport.sys

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.

MORE INFORMATION

The Scsiport.sys file is responsible for cleaning up logical unit number (LUN) information stored in the SCSI port driver. The function does remove the LUN information from its internal storage, but it does not update its count for the number of logical units.

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Modification Type:	Minor	Last Reviewed:	9/26/2005
Keywords:	kbHotfixServer kbQFE kbbug kbfix kburl kbWin2000PreSP2Fix KB277997