GeezerVisonThe World Wide Web, restored to 800 pixels of glory. | ||||||||||||||||||||||||
| Home|About|Gaming cabinet|Archives|How it works|Starter sites | ||||||||||||||||||||||||
GeezerVison is showing ss64.com — W32tm command - Windows CMD W32TM.exeTime Service Utility. Syntax
Register the time service, and add default config to the registry:
W32TM /register
Unregister the time service, and remove config from the registry:
W32TM /unregister
Monitor time differences, optionally for a domain/computer(s), by default the current domain and its domain controllers:
W32TM /monitor [/domain:domain_name] [/computers:name[,name[,name...]]] [/threads:num] [/ipprotocol: <4|6>] [/nowarn]
Convert a Windows NT system time, in (10^-7)s intervals from 0h 1-Jan 1601, into a readable format.
W32TM /ntte NT_Time_Epoch
Converts a Network Time Protocol (NTP) time, in (2^-32)s intervals from 0h 1-Jan 1900, into a readable format:
W32TM /ntpte Network_Time
Tell a computer that it should resynchronize its clock as soon as possible, discarding all accumulated error stats:
W32TM /resync [/computer:computer] [/nowait] [/rediscover] [/soft]
Display a strip chart of the offset between this computer and another computer:
W32TM /stripchart /computer:target [/period:refresh] [/dataonly]
[/samples:count] [/packetinfo] [/ipprotocol:<4|6>] [rdtsc]
Adjust the configuration of target (default=local computer):
W32TM /config [/computer:target] [/update] [/manualpeerlist:peers]
[/syncfromflags:source] [/LocalClockDispersion:seconds]
[/reliable:(YES|NO)] [/largephaseoffset:milliseconds]
Display the current time zone settings:
W32TM /tz
Display the values that are associated with a given registry key on target (default=local computer):
(default/root key is HKLM\System\CurrentControlSet\Services\W32Time)
W32TM /dumpreg [/subkey:key] [/computer:target]
Display a computer’s Windows Time service information:
W32TM /query [/computer:target] { /source | /configuration | /peers | /status } [/verbose]
Enable or disable a local computer Windows Time service private log:
W32TM /debug {/disable | {/enable /file:name /size:bytes /entries:value [/truncate]}}
Display the status of leap seconds on the local machine:
W32TM /leapseconds /getstatus [/verbose]
Options:
Domain The domain to monitor. If no domain name is specified, or neither the domain nor
computers option is specified, the default domain is used.
This option might be used more than once.
computers Monitor the given list of computers. Computer names are separated by commas, with
no spaces. If a name has a prefix of a ‘*’, it is treated as a primary domain
controller (PDC). You can use this option more than once.
computer The computer to act upon, by default the local computer.
threads The number of computers to analyze simultaneously. 1-50, default=3.
ipprotocol Select IPv4 or ipv6 (default=whatever is available).
NT_Time_Epoch
A hex value representing a 64 bit integer that represents the number of seconds
elapsed since 1900-01-01 00:00:00 (can be supplied as either Hex or integer)
In reverse byte order, the first hex byte is the least significant:
(1900-01-01 00:00:01 is encoded as 0x01000000)
/configuration
Display the configuration of run time and where the setting comes from.
In verbose mode, display the undefined or unused setting also.
/Dataonly Display only the data, without graphics.
/disable Disable the private log.
/enable Enable the private log.
file:name The absolute file name.
size:bytes The maximum size for circular logging.
entries:value Contains a list of flags, specified by number and separated by commas, that specify
the types of information that should be logged. Valid numbers are 0 to 300.
A range of numbers is valid, in addition to single numbers, such as 0 through 100,103,106.
Value 0-300 is for logging all information.
/Ipprotocol 4|6
Specify the IP protocol to use. Default = use whatever is available.
/largephaseoffset:milliseconds
Sets the time difference between local time and network time that W32time will consider to be a spike.
/LocalClockDispersion:seconds
Configures the accuracy of the internal clock that W32time will assume when
it cannot acquire time from its configured sources.
/manualpeerlist:peers
Set the manual peer list to peers, which is a space-delimited list of Domain Name
System (DNS) and/or IP addresses. When you are specifying multiple peers, this option
must be enclosed in quotation marks (").
/nowait Do not wait for the resynchronization to occur; return immediately.
Otherwise, wait for the resynchronization to complete before returning.
/nowarn Do not display a warning message.
/packetinfo
Print out NTP packet response message.
/peers Display a list of peers and their status.
/period:refresh
The time between samples, in seconds. The default value is 2 seconds.
/reliable:(YES|NO)
Set whether this computer is a reliable time source.
This setting is meaningful only on domain controllers.
/rdtsc Display the TSC values (time for NTP response) and time offset data in CSV format.
The output displays TSC and FILETIME values captured before the NTP request is sent,
TSC value after an NTP response is received along with NTP roundtrip and time-offset values.
/rediscover Redetect the network configuration and rediscover network sources;
then, resynchronize.
/samples:count
Collect count samples; then, stop.
If a value is not specified, samples will be collected until Ctrl+C is pressed.
/soft This option is only provided for compatibility with older time servers and will
resynchronize using existing error statistics. Not useful.
/source Display the time source.
/status Display Windows Time service status.
/syncfromflags:source
Sets what sources the NTP client should synchronize from. source should be a
comma-separated list of these keywords (not case sensitive):
MANUAL — Include peers from the manual peer list.
DOMHIER — Synchronize from a domain controller in the domain hierarchy.
NO — Do not synchronize from any server.
ALL — Synchronize from both manual and domain peers.
/update Notify the time service that the configuration has changed, causing the changes
to take effect.
/verbose Set the verbose mode to display more information.
/truncate Truncate the file if it exists.
/? Display help.
Windows Time (and w32tm.exe) are RFC 1305 (NTPv3) compliant, which includes compensating for network latency. By default the Windows Time service (w32time) will synchronize its time once per week. The options /debug, /packetinfo and /ipprotocol are available from Windows Vista and above. /stripchart /packetinfo - will output three timestamps - The first hex number is byte order reversed NTP date, followed by the ANSI date (number of days since 1st Jan 1601) followed by the date/time in readable/local format. The option /ntpte - will output three timestamps - The first hex number is an NTTE date (as also understood by w32tm.exe /ntte ), followed by the ANSI date (number of days since 1st Jan 1601) followed by the date/time in readable/local format. The option /ntte - will output two timestamps - first the ANSI date (number of days since 1st Jan 1601) followed by the date/time in readable/local format. A computer that is a member of a domain is configured by default to synchronize from the domain hierarchy, manually-specified synchronization is most useful for the forest root of the domain or for computers that are not joined to a domain. Secure Time Seeding
Public NTP servers
Default poll intervals:
If the current time is significantly different to the Time Source (>PhaseCorrectRate), Windows Time will reset it immediately, If the current time is only slightly different to the Time Source, then Windows Time will set the clock back slowly. To setup high accuracy time requires a suitable low latency (distance) connection to the time server: 1 second accuracy <= 6400 miles, 50 milliseconds accuracy <= 310 miles and for 1 millisecond accuracy <= 62 miles. Data centres with a requirement for highly accurate and available time will often choose to use a GPS hardware device as a time source. ExamplesSet the local Windows Time client to point to two different time servers, one named 'time.nist.gov' and another ' time.apple.com': W32TM.exe /config /manualpeerlist:"time.nist.gov time.apple.com" /syncfromflags:manual /update Resync to the time source immediately:
Monitor time differences for DCs in the current domain:
Check the configuration of Windows Time on the current machine:
Compare the local computer time with time.google.com
Check the Windows Time client configuration from a client computer running Windows that has a host name of PC64
Convert an NTTE formatted date into a readable format, if using hex, prefix with 0x:
Convert an NTP formatted date into a readable format, if using hex, prefix with 0x:
“We have a normal. Related commandsW32Time Sync - SpecialPollInterval may be ignored on workgroup computers. Copyright © 1999-2026 SS64.com
Some rights reserved | ||||||||||||||||||||||||
| You are visitor 01402503 — GeezerVison does not store the pages you look up. Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required. |