Microsoft KB Archive/256877

= "Operating System Not Found" Running Setup with Compaq Smart Array Controllers =

Article ID: 256877

Article Last Modified on 2/19/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q256877



SYMPTOMS
When you are running Windows 2000 Setup, the server may stop responding (hang) with the following error message after text-mode Setup finishes:

Operating system not found

This behavior may occur if you are using a Compaq Smart Array controller with an older Array device driver, and the boot partition is larger than 5 GB.



CAUSE
This issue occurs because the information in the master boot record (MBR) that points to the boot partition is incorrect and Windows 2000 is unable to finish booting.

The information in the MBR is incorrect because of a problem in the Cpqarray.sys driver that returns corrupted information to Setup when it attempts to read the size and capacity of the drive. This results in Setup writing incorrect data to the MBR.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

To resolve this issue, please contact Compaq.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

This problem was first corrected in Windows 2000 Service Pack 1.

Keywords: kbbug kberrmsg kbfix kbhardware kbqfe kbsetup kbwin2000sp1fix KB256877

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