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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.
The Windows NT 4.0 Service Pack 4 version of the Atapi.sys file does not correctly handle the Logical Unit Number (LUN).
Windows NT Server or Workstation 4.0
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:
152734how 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:
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition.
This problem was first corrected in Windows NT Server 4.0 Service Pack 6 and Windows NT Server 4.0, Terminal Server Edition Service Pack 6.