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dkumar
Seasoned But Casual Onlooker
82 Posts
Status: offline |
 Posted - 07/23/2010 : 08:19:17 AM
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Windows crashes after 49.7 days
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Windows crashes automatically if you don't switch off the machine for 49.7 days.This is accepted by Microsoft.
Do you know why?
In windows the Virtual Machine Manager(VMM) is responsible for creation, execution, monitoring and termination of virtual machines. This VMM is a 32 bit protected mode operating system, provides a number of system service at chip level of programming.
One of these services is "Get_System_Time". This particular service loads the EAX register with the time in milliseconds since Windows started.This service is accurate to 1ms.
EAX is a 32 bit register. So the maximum number of milliseconds it can hold is:
(2^32) - 1 = 4294967295 milliseconds
= 4294967.295 seconds
= 71582.79 minutes
= 1193 hours
= 49.7 days
So after 49.7 days the EAX resets to zero.Most of the Drivers use this Time Service to keep track of the time out of various services they provide. So after 49.7 days the drives cannot use the Get_System_Time funtion of VMM and they crash.
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aval
Honorable But Hopeless Addict
USA
2204 Posts
Status: offline |
Posted - 07/23/2010 : 09:12:07 AM
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quote:
Windows crashes after 49.7 days
No it's not correct - certainly not for recent Windows versions (see below).
The fact that Windows servers (mine for example) run for more than 50 days without reboot is proof enough.
Moreover, a bit of research shows that this problem only affected - in some cases - Windows 95 and 98 - obsolete for some time now anyway:
http://support.microsoft.com/kb/216641
http://news.cnet.com/2100-1040-222391.html
Note the date on that last article: 1999 |
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cj_berlin
Honorable But Hopeless Addict
Germany
3173 Posts
Status: offline |
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Xenophane
Honorable But Hopeless Addict
Denmark
2790 Posts
Status: online |
Posted - 07/23/2010 : 3:04:12 PM
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CJ, you have'nt noticed they stopped working after 49,7 days  |
SIG> George Bernard Shaw : The power of accurate observation is commonly called cynicism by those who have not got it. </SIG>
You can read my blog at www.xipher.dk |
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sreeraj
Here To Stay
India
203 Posts
Status: offline |
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Rastor728
Old Timer
USA
361 Posts
Status: offline |
Posted - 07/26/2010 : 1:03:37 PM
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quote:
Originally posted by Xenophane
CJ, you have'nt noticed they stopped working after 49,7 days
Some don't run that long between reboots! |
"a fanatic is one who cannot change his mind and will not change the subject." --Sir Winston Churchill |
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Mark Minasi
Chief cook and bottle washer
USA
9668 Posts
Status: offline |
Posted - 07/31/2010 : 09:57:20 AM
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| This is related to a bug in Win 2000 that got fixed immediately if I recall right. |
Mark
tweetin' at mminasi |
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wkasdo
Administrator
Netherlands
6246 Posts
Status: offline |
Posted - 07/31/2010 : 3:18:23 PM
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| As I recall it, this was a windows 98 bug that was never fixed. |
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Mark Minasi
Chief cook and bottle washer
USA
9668 Posts
Status: offline |
Posted - 08/02/2010 : 4:32:04 PM
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| The story I heard was that either Win 2000 or NT 4... see how old it is?<g> ... IMMEDIATELY started causing this problem. It turned out that -- duh! -- no one leaves a beta up for several weeks, so no one noticed it. It may have even occasioned the need for a superfast, small service pack. But in any case, it's been fixed for 10 or 14 years, so I don't think there's much to worry about, save for those shops still running NT 4.0 RTM. |
Mark
tweetin' at mminasi |
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Is this correct ?Windows crashes after 49.7 days
