Problems with ATAPI Multiple-LUN Devices

ID: Q236940

The information in this article applies to:

Microsoft Windows NT Server version 4.0 SP4
Microsoft Windows NT Workstation version 4.0 SP4

SYMPTOMS

After you apply Windows NT 4.0 Service Pack 4, Atapi.sys recognizes ATAPI multiple-LUN devices correctly (such as a CD-ROM/PD combination drive). However, you may encounter the following problems with the device:

With a write-protected PD media, you may receive the following error message:

The system was attempting to transfer file data from buffers to \Device\Harddisk(x)\Partition(y).
The write operation failed, and only some of the data may have been written to the files.

If you replace one PD media with another and then press F5 to refresh the view in Windows NT Explorer, the media change is not detected and you continue to see the contents of the first media.

CAUSE

The Windows NT 4.0 Service Pack 4 version of the Atapi.sys file does not correctly handle the Logical Unit Number (LUN).

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:

http://www.microsoft.com/windows/servicepacks/

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

STATUS

Microsoft has confirmed this to be a problem in Windows NT 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 6.

Additional query words:

Keywords : kbbug4.00 kbfix4.00 NT4SP6Fix
Version : winnt:4.0 SP4
Platform : winnt
Issue type : kbbug