Microsoft KB Archive/916045

= After a very large I/O packet is lost in a Windows Server 2003 SAN environment, a long delay may occur before error recovery processing starts =

Article ID: 916045

Article Last Modified on 3/28/2006

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APPLIES TO


 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)

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SYMPTOMS
A very large I/O packet may be lost or corrupted in a Microsoft Windows Server 2003 Storage Area Network (SAN) environment. In this case, it may take a long time for the I/O time-out to occur and for error recovery processing to start.



CAUSE
This problem occurs because the current Classpnp time-out algorithm increases the SCSI Request Block (SRB) time-out value by 60 seconds for every 64 KB of data transfer that is requested. The algorithm ignores the 60-second maximum time-out value in the registry.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbtshoot kbexpertiseadvanced KB916045

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