This article was previously published under Q287935
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The Exchange 2000 Jet engine may log 1450 errors when it attempts to extend a log file.
Microsoft Windows 2000 may run out of kernel resources (PTEs).
NOTE: Having the /3GB switch on makes this considerably more likely.
Windows 2000 fails large I/Os because it cannot allocate enough memory in the kernel. This affects all processes on the server. When Jet encounters these errors, it reduces the size of its I/Os down to as low as 4 kilobytes (KB). Jet often uses 1 megabyte (MB) I/Os because that is the fastest way to extend a file under Windows.
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
The English version of this fix should have the following file attributes or later:
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 1.