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FSUTIL BEHAVIOR
Description
| Syntax
| Parameters
| Switches
| Related
| Notes
| Examples
| Errorlevels
| Availability
Queries the current settings for generating 8.3
character-length file names, allowing extended
characters in 8.3 character-length file names on NTFS
volumes, updating the last access timestamp on NTFS
volumes, how often quota events are written to the
system log, and the size of the master file table (MFT)
Zone. Enables or disables the use of 8.3
character-length file names, allowing extended
characters in 8.3 character-length file names on NTFS
volumes, and updating the last access timestamp on NTFS
volumes. Enables you to change how often quota events
are written to the system log and to change the amount
of disk space reserved for the MFT Zone.
Syntax
FSUTIL BEHAVIOR
help
FSUTIL BEHAVIOR
query
allowextchar
| disable8dot3
| disablelastaccess
| mftzone
| quotanotify
FSUTIL BEHAVIOR
set
allowextchar 1 | 0
| disable8dot3 1 | 0
| disablelastaccess 1 | 0
| mftzone value
| quotanotify frequency
Parameters
- allowextchar 1 | 0
(NTXP)
- Determines whether characters from the extended
character set, including diacritic characters, can be
used in 8.3 short file names on NTFS volumes.
- Updates the
HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\NtfsAllowExtendedCharacterIn8dot3Name
registry key.
- disable8dot3 1 | 0
(NTXP)
- Disables creation of 8.3 character-length file
names on FAT- and NTFS-formatted volumes.
- Set to 0, every time you create a file with a long
file name, NTFS creates a second file entry that has
an 8.3 character-length file name. When NTFS creates
files in a folder, it must look up the 8.3
character-length file names associated with the long
file names.
- Updates the
HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\NtfsDisable8dot3NameCreation
registry key.
- disablelastaccess 1 | 0
(NTXP)
- Determines whether NTFS updates the last access
timestamp on each directory when it lists the
directories on an NTFS volume.
- Designed to reduce the logging impact of updating
the last access timestamp on folders and directories.
Disabling the Last Access Time improves the speed of
folder and file access.
- Each file and folder on an NTFS volume contains an
attribute called Last Access Time. This attribute
defines when the file or folder was last accessed,
such as when a user lists folders, adds files to a
folder, reads a file, or makes changes to a file. The
most up-to-date Last Access Time is stored in memory
and is eventually written to the disk in two different
locations. One is within the file's attribute, which
is part of its MFT record. The second is in the index
of the directory that contains the file.
- The Last Access Time on disk is not always current.
This lag occurs because NTFS delays writing the Last
Access Time to disk when users or programs perform
read-only operations on a file or folder, such as
listing the folder's contents or reading (but not
changing) a file in the folder. If the Last Access
Time is kept current on disk for read operations, all
read operations become write operations, which
impacts NTFS performance.
- Note that file-based queries of Last Access Time
are accurate even if all on-disk values are not
current. NTFS returns the correct value on queries
because the accurate value is stored in memory.
- NTFS typically updates a file's attribute on disk
if the current Last Access Time in memory differs by
more than an hour from the Last Access Time stored on
disk, or when all in-memory references to that file
are gone, whichever is more recent.
- NTFS updates the index of the directory that
contains the file when NTFS updates the file's Last
Access Time and detects that the Last Access Time for
the file differs by more than an hour from the Last
Access Time stored in the directory's index. This
update typically occurs after a program closes the
handle used to access a file within the directory. If
the user holds the handle open for an extended time,
a lag occurs before the change appears in the index
entry of the directory.
- Note that one hour is the maximum time that NTFS
defers updating the Last Access Time on disk. If NTFS
updates other file attributes such as Last Modify
Time, and a Last Access Time update is pending, NTFS
updates the Last Access Time along with the other
updates without additional performance impact.
- Note this parameter can affect programs such as
backup and Remote Storage that rely on this feature.
- Updates the
HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\NtfsDisableLastAccessUpdate
registry key.
- help
(NTXP)
- Display help.
- mftzone value
(NTXP)
- The master file table (MFT) Zone is a reserved
area that enables the MFT to expand as needed, in
order to prevent MFT fragmentation.
Set the value from 1 (default) to 4 (maximum).
The value is in 8ths of the disk.
- The value is an approximation of the initial size
of the MFT plus the MFT Zone on a new volume and is
set at mount time for each file system. As space on
the volume is used, NTFS adjusts the space reserved
for future MFT growth. If the MFT Zone is already
large, the full MFT Zone size is not reserved again.
Since the MFT Zone is based on the contiguous range
past the end of the MFT, it shrinks as the space is
used.
- The file system does not redetermine the MFT Zone
location until the current MFT Zone is completely
used. This never occurs on a typical system.
- query
(NTXP)
- Queries the file system behavior parameters.
- quotanotify frequency
(NTXP)
- Configures how frequently NTFS quota violations
are reported in the system log. Enter a frequency 0
through 4294967295 seconds for how often quota
violations are written to the system log.
Default is 1 hour (3600 seconds).
- set
(NTXP)
- Queries the file system behavior parameters.
Switches
none.
Related
FSUTIL DIRTY
FSUTIL FILE
FSUTIL FSINFO
FSUTIL HARDLINK
FSUTIL OBJECTID
FSUTIL QUOTA
FSUTIL REPARSEPOINT
FSUTIL SPARSE
FSUTIL USN
FSUTIL VOLUME
Notes
none.
Examples
none.
Errorlevels
none.
Availability
- External
-
- DOS
-
none
- Windows
-
none
- Windows NT
-
NTXP
Last Updated: 2003/07/28
Direct corrections or suggestions to:
Rick Lively