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Microsoft Windows NT does not detect a change in media when a FAT-formatted PD is removed from the drive. Even if another disk is inserted, both Windows NT Explorer and the DIR command will continue to display the list of files from the first FAT-formatted disk.
If the first PD disk present is formatted with the NTFS file system, Windows NT will correctly detect the change in media when the first disk is removed. Only FAT-formatted media display this problem.
After the FAT-formatted media has been inserted and replaced, the only way Windows NT can display the correct media contents is if the media is reformatted or the system is restarted.
This problem occurs because the Atapi.sys driver, which is responsible for this device, does not handle media change detection on this hardware correctly.
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:
152734 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:
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 NT Server version 4.0, Terminal Server Edition Service Pack 6.