Volume Lock Request Does Not Release Volume After File Operation (234339)
The information in this article applies to:
- Microsoft Windows NT Server 4.0 Terminal Server Edition
- Microsoft Windows NT Server 4.0
- Microsoft Windows NT Workstation 4.0
This article was previously published under Q234339 SYMPTOMS
When you run a program that improperly uses an NTFS volume lock function call on a computer running Windows NT 4.0, the volume lock may not be removed after the program has finished running.
CAUSE
The DeviceIoControl() function can be used to lock the volume by specifying FSCTL_LOCK_VOLUME as I/O control code. This function may not work properly if it is called after you perform the following file operations:
- Open the destination file and do some I/O for that file. Then close the file.
- As soon as you close the destination file, rename another file to the destination file by using MoveFileEx().
Utility programs affected with this problem require exclusive access to the disk volume. Those programs may report an error message as if another process is still accessing the volume. For instance, if you run the CHKDSK -F command against a disk volume experiencing this problem, the following error message may be displayed:
The type of the file is NTFS.
Cannot lock current drive.
Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts?
Disk Administrator may also be affected as well.
The closed file object is not dereferenced if the closed file was specified as the new file for the MoveFileEx() function before the file cache write process completes. Other file operations other than locking a volume work fine. This is an NTFS-specific problem. FAT volumes are not affected by this problem.
RESOLUTIONWindows 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:
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:
Windows NT Server 4.0, Terminal Server EditionTo 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 the
Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
WORKAROUND
You can run Clearmem.exe to recover from this problem. The Clearmem utility flushes the section used as file cache, thus the file object in question is dereferenced by running Clearmem. This tool is included in the Microsoft Windows NT 4.0 resource kit.
STATUSMicrosoft 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 version 4.0, Terminal Server Edition Service Pack 6.
| Modification Type: | Minor | Last Reviewed: | 9/23/2005 |
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| Keywords: | kbHotfixServer kbQFE kbbug kbfix kbQFE KB234339 |
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