DOCUMENT:Q260059 08-MAY-2002 [winnt] TITLE :Extending a Volume Set Requires Chkdsk to Be Run PRODUCT :Microsoft Windows NT PROD/VER::4.0 OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Workstation version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When you use the Disk Administrator tool to create a volume set from an existing NTFS partition or to extend an existing NTFS volume set, Windows NT 4.0 requires that the computer be rebooted so that Chkdsk (Autochk.exe) can be run. CAUSE ===== This requirement is caused by the design of the volume-extension routine. Because Chkdsk contains code to correct NTFS volumes that are incorrectly sized, Disk Administrator does not perform all the work in adjusting the size of the NTFS volume. Instead, Disk Administrator modifies the partition table information and some key header information for the NTFS volume, and then starts Chkdsk so that Chkdsk can adjust internal NTFS tables that must be resized. This method of resizing volumes works well but results in otherwise unnecessary downtime for the computer, particularly if the volume that you are extending contains many files. RESOLUTION ========== A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows NT 4.0 service pack that contains this fix. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: Date Time Size File name Platform ----------------------------------------------------- 03/14/2000 06:36p 430,864 Autochk.exe Intel 03/14/2000 07:00p 375,056 Kernel32.dll Intel 03/14/2000 06:39p 368,464 Ntfs.sys Intel 03/14/2000 06:36p 663,312 Autochk.exe Alpha 03/14/2000 07:00p 589,584 Kernel32.dll Alpha 03/14/2000 06:38p 561,808 Ntfs.sys Alpha NOTE: In order to avoid a full scan during autochk, it is also necessary to edit the system registry as follows: Ensure that a value named "NtfsEnableVolumeExtension" exists under: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem The value should be a REG_DWORD and its data should be 0x1 to avoid the full scan. STATUS ====== Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article. MORE INFORMATION ================ Resizing an NTFS volume involves less work for Chkdsk than validating that an NTFS volume is completely correct (or "clean"). A reboot is still required for the resizing process after you install the updated files from the hotfix that is described in this article; however, if the volume is not marked "dirty" for any reason, the volume extension takes place without requiring the full three-pass scan of the volume that Autochk.exe typically performs. This typically takes no more than a few seconds. Additional query words: ====================================================================== Keywords : kbWinNT400PreSP7Fix Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : :4.0 Hardware : ALPHA x86 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 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