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System Time Change
Hello,
I am getting the system time change events from Kernel-General
Ex: The system time has changed to XXX from XXXX
This affects the network connectivity. Can someone suggests what is causing it? Windows Time service is disabled.
I am getting the system time change events from Kernel-General
Ex: The system time has changed to XXX from XXXX
This affects the network connectivity. Can someone suggests what is causing it? Windows Time service is disabled.
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One thing which you should do is to check when it happens, if it happens on OS startup so may be some startup service doing this.
This problem is very frequent and can have many causes, not all of them are known.
You already did the obvious, which is replacing the on-board battery, so only unobvious reasons remain. Some I can think of are :
1Your time-server is bad, so change the one you are using by right-click on the clock / Adjust date/time / Internet Time / Change settings.
2.Check the date/time of your router - sometimes this affects Windows.
3. Select correct timezone in date and time settings.
4. Boot with safemod and check logs again.
5.Reinstall Windows - this was the only solution for some people to undo the corruption.
You already did the obvious, which is replacing the on-board battery, so only unobvious reasons remain. Some I can think of are :
1Your time-server is bad, so change the one you are using by right-click on the clock / Adjust date/time / Internet Time / Change settings.
2.Check the date/time of your router - sometimes this affects Windows.
3. Select correct timezone in date and time settings.
4. Boot with safemod and check logs again.
5.Reinstall Windows - this was the only solution for some people to undo the corruption.
There are many of them, can't simply point out one from them, you have to figure it out step by step
Is the Windows Time Service running?
If you want to confirm the root cause, please enable the W32Time service log or enable "Audit Privilege Use" locally with gpedit.msc. For more information, please refer to the following links:
How to turn on debug logging in the Windows Time Service
http://support.microsoft.com/kb/816043
Audit privilege use
http://technet.microsoft.com/en-us/library/cc784501(WS.10).aspx
In the meantime, you can use the following commands to disable Windows Time Service.
net stop W32Time
sc config W32Time start= disabled
You can also remove the service from registry to check the results. Please be sure to back up first.
Go to: HKEY_LOCAL_MACHINE\SYSTEM\
If you want to confirm the root cause, please enable the W32Time service log or enable "Audit Privilege Use" locally with gpedit.msc. For more information, please refer to the following links:
How to turn on debug logging in the Windows Time Service
http://support.microsoft.com/kb/816043
Audit privilege use
http://technet.microsoft.com/en-us/library/cc784501(WS.10).aspx
In the meantime, you can use the following commands to disable Windows Time Service.
net stop W32Time
sc config W32Time start= disabled
You can also remove the service from registry to check the results. Please be sure to back up first.
Go to: HKEY_LOCAL_MACHINE\SYSTEM\
where are your system getting their time from--you say you disabled Windows Time Service but all system must get time from somewhere--please type
net time
from a comand prompt and let us know what that says
net time
from a comand prompt and let us know what that says
if the system time keeps changing that means that the time source that its pulling it from is changing.
Is the machine domain joined
what does the following cmd show
w32tm /query /source
if its domain joined it should show a domain controller and you then need to check what is happening that as it will affect all other members of the domain
Is the machine domain joined
what does the following cmd show
w32tm /query /source
if its domain joined it should show a domain controller and you then need to check what is happening that as it will affect all other members of the domain
We do not use windows time service as it is not accurate at all.
Instead, we make use of NTP time server in our geological area. Details are in the link below.
http://www.pool.ntp.org/zh/use.html
Instead, we make use of NTP time server in our geological area. Details are in the link below.
http://www.pool.ntp.org/zh/use.html
Windows Time is disabled and the Net Time command produced the following
"could not locate time server"
"could not locate time server"
Standalone server without internet connection?
If it is the case, you need to manually check and correct the time from time to time.
If it is the case, you need to manually check and correct the time from time to time.
you can make windows time accurate by making sure you DC's pull from a reliable source and then use the windows time service to push it out, using the settings to control it.
If you have no internet connection and no other source to pull it form then the system clock from the bios/motherboard is playing up and changing the time.
If its only by MS and not minutes or hours then its not a massive problem
If you have no internet connection and no other source to pull it form then the system clock from the bios/motherboard is playing up and changing the time.
If its only by MS and not minutes or hours then its not a massive problem
Did you say this is a server w/o internet connection? If it doesn't then it will get its time from the system itself--you may have to change the CMOS battery.
We do not use windows time service as it is not accurate at all.How accurate do you need it to be? Kerberos gets along just fine as long as everything is within five minutes (by default - that value can be changed).
Most environments don't need high-precision time synchronization, but if you're running something that does (if you're NASDAQ, for example), then you're correct: the Windows Time service isn't designed for that. Disabling the Windows Time service is only part of the solution, though; you'll also need to install and run a third-party time-sync app. The KB article at the link above contains another link to a list of these apps.
We do not use windows time service as it is not accurate at all.How accurate do you need it to be? Kerberos gets along just fine as long as everything is within five minutes (by default - that value can be changed).
Most environments don't need high-precision time synchronization, but if you're running something that does (if you're NASDAQ, for example), then you're correct: the Windows Time service isn't designed for that. Disabling the Windows Time service is only part of the solution, though; you'll also need to install and run a third-party time-sync app. The article above contains a link to a list of these apps.
The server is connected to the Internet.
So, where in the OS does this (time-checking-correction)
So, where in the OS does this (time-checking-correction)
As far as the time synching goes here are instructions I have relied on for years
Synching to an External Time Source. If you want to ensure that the clocks on your machines are more accurate in terms of absolute (and not just relative) time, you can sync to one of the reliable time servers available on the Internet. Open Registry Editor (regedit.exe) and configure the following registry entries:
HKLM\SYSTEM\CurrentControl
This registry entry determines which peers W32Time will accept synchronization from. Change this REG_SZ value from NT5DS to NTP so the server synchronizes from the list of reliable time servers specified in the NtpServer registry entry described below.
HKLM\SYSTEM\CurrentControl
This registry entry controls whether the local computer is marked as a reliable time server (which is only possible if the previous registry entry is set to NTP as described above). Change this REG_DWORD value from 10 to 5 here.
HKLM\SYSTEM\CurrentControl
This registry entry specifies a space-delimited list of stratum 1 time servers from which the local computer can obtain reliable time stamps. The list may consist of one or more DNS names or IP addresses (if DNS names are used then you must append ,0x1 to the end of each DNS name). For example, to synchronize with tock.usno.navy.mil, an open-access SNTP time server run by the United States Naval Observatory, change the value of the NtpServer registry entry from time.windows.com,0x1 to tock.usno.navy.mil,0x1 here. Alternatively, you can specify the IP address of this time server, which is 192.5.41.41 instead. (Verify this detail)
Now stop and restart the Windows Time service using the following commands:
net stop w32time
net start w32time
It may take an hour or so to fully synchronize with the external time server because of the nature of the polling method W32Time uses. Depending on the latency of your Internet connection, the accuracy of the CMOS clock on your DC may be within a second or two of UTC.
Alternatively, if you don’t want to wait for time convergence to occur between your time server and the external time server, you can run the following command on your server:
w32tm /resync /rediscover
Synching to an External Time Source. If you want to ensure that the clocks on your machines are more accurate in terms of absolute (and not just relative) time, you can sync to one of the reliable time servers available on the Internet. Open Registry Editor (regedit.exe) and configure the following registry entries:
HKLM\SYSTEM\CurrentControl
This registry entry determines which peers W32Time will accept synchronization from. Change this REG_SZ value from NT5DS to NTP so the server synchronizes from the list of reliable time servers specified in the NtpServer registry entry described below.
HKLM\SYSTEM\CurrentControl
This registry entry controls whether the local computer is marked as a reliable time server (which is only possible if the previous registry entry is set to NTP as described above). Change this REG_DWORD value from 10 to 5 here.
HKLM\SYSTEM\CurrentControl
This registry entry specifies a space-delimited list of stratum 1 time servers from which the local computer can obtain reliable time stamps. The list may consist of one or more DNS names or IP addresses (if DNS names are used then you must append ,0x1 to the end of each DNS name). For example, to synchronize with tock.usno.navy.mil, an open-access SNTP time server run by the United States Naval Observatory, change the value of the NtpServer registry entry from time.windows.com,0x1 to tock.usno.navy.mil,0x1 here. Alternatively, you can specify the IP address of this time server, which is 192.5.41.41 instead. (Verify this detail)
Now stop and restart the Windows Time service using the following commands:
net stop w32time
net start w32time
It may take an hour or so to fully synchronize with the external time server because of the nature of the polling method W32Time uses. Depending on the latency of your Internet connection, the accuracy of the CMOS clock on your DC may be within a second or two of UTC.
Alternatively, if you don’t want to wait for time convergence to occur between your time server and the external time server, you can run the following command on your server:
w32tm /resync /rediscover
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Otherwise Check the time in your BIOS. Hardware time will throw the OS off. It may be what is causing Windows to change its time back.