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DOCUMENT:Q104169 06-OCT-1993 [W_NT]
TITLE :Files Skipped with Windows NT Backup
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:
--------------------------------------------------------------------
The information in this article applies to:
- Microsoft Windows NT operating system version 3.1
- Microsoft Windows NT Advanced Server version 3.1
--------------------------------------------------------------------
WARNING: Using Registry Editor incorrectly can cause serious,
system-wide problems that may require you to reinstall Windows NT to
correct them. Microsoft cannot guarantee that any problems resulting
from the use of Registry Editor can be solved. Use this tool at your
own risk.
SUMMARY
=======
The Windows NT Backup program (NTBACKUP.EXE) automatically skips the
following types of files during the backup and restore processes:
- Files that are locked by another application other than Windows NT
Backup
-and-
- Files that are skipped by default by Windows NT Backup
MORE INFORMATION
================
Files That Are Locked by Another Application
Other Than Windows NT Backup
--------------------------------------------
Windows NT supports the backup of local files that are exclusively
locked by the operating system, such as event logs and registry files;
however, another type of skipped file that Windows NT Backup
encounters is that which is in use and locked by another process.
In this kind of event, Windows NT Backup displays a "Skip Open Files
Wait Time" dialog box. An internal timer is then started and Windows
NT Backup waits 30 seconds for the file to become available. During
that time, Windows NT Backup continuously attempts to access the
locked file. If the file does not become available during the
30-second waiting period, Windows NT Backup skips the file, places its
name in the backup log file (if the log is enabled), marks it as
skipped in the log, and continues to the next file. You have the
option to choose the Cancel button in the dialog box and immediately
move to the next file, logging the skipped file as previously
described. If the file becomes available before the 30-second time-out
period, Windows NT Backup backs up that file and continues with the
rest of the backup.
If the file has an attached alternate data stream that is locked,
Windows NT waits 30 seconds for the stream to become available. If the
stream does not become available in that time, Windows NT Backup makes
an entry in the log (if enabled) indicating that the file was corrupt.
You can modify the following registry entries to adjust the skipped
files options:
HKey_current_user\Software\Microsoft\Ntbackup\User Interface
Name: Skip open files
Type: REG_SZ
Default: 0
Definition:
0 = do not skip, wait
1 = skip files that are opened unreadable
2 = wait on open files for "Wait time"
Name: Wait time
Type: REG_SZ
Data: 30
Definition:
Maximum time (seconds) to wait for open files. Default is 30 seconds.
Maximum value is 65535
Files That Are Skipped by Default by Windows NT Backup
------------------------------------------------------
- Files you do not have permission to read. Only those with backup
rights can copy files they do not own in Windows NT Backup.
- Files that are temporary in nature--such as PAGEFILE.SYS,
WIN386.SWP, 386SPART.PAR, BACKUP.LOG, and RESTORE.LOG--are neither
backed up nor restored by Windows NT Backup. The list of skipped files
is hard-coded into Windows NT Backup and cannot be changed.
- Registry files on remote computers. Windows NT backs up only local
registry files.
Additional reference words: 3.10
KBCategory:
KBSubCategory: 32ap
=============================================================================
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. SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.
Copyright Microsoft Corporation 1993.