Microsoft KB Archive/271274

= STOP 0x7B Error Message or Unformatted Partitions After You Apply Windows 2000 Service Pack 1 =

PSS ID Number: 271274

Article Last Modified on 11/20/2003

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The information in this article applies to:


 * Microsoft Windows 2000 Server SP1
 * Microsoft Windows 2000 Advanced Server SP1
 * Microsoft Windows 2000 Professional SP1

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This article was previously published under Q271274



SYMPTOMS
When you restart your computer after you install a Windows 2000 Service Pack, you may experience one of the following symptoms:  While your computer is restarting, you may receive the following error message on a blue screen, and your computer may stop responding (hang):

STOP 0x0000007B INACCESSIBLE_BOOT_DEVICE

 After your computer restarts, partitions on physical hard disks may be either missing or appear in the Disk Management tool as 7.88 gigabytes (GB) in size and &quot;Healthy&quot;. However, within the drive, one or more of the partitions may be listed as being unformatted or damaged. Also, if you try to open the partition in Windows Explorer, you receive a message that indicates the drive is not formatted and you are then prompted to format the drive.



CAUSE
This issue can occur because Windows 2000 Service Packs introduced a fix to correct when CHS or LBA addressing should be used to address a drive.

Some IDE hard disks provide a jumper that limits the number of cylinders. If this jumper is in use, the hard disk is not addressed properly after you apply Windows 2000 Service Packs. Note that this jumper is not required when you are running Windows 2000 and is not usually installed as a default setting by the manufacturer, and should be removed.



RESOLUTION
To resolve this issue, remove the jumper that limits cylinders from each affected IDE hard disks so that the drive can be addressed properly after you apply Windows 2000 SP1. For information about how to do so, and to obtain detailed information about your specific model of hard disk:
 * View the documentation that is included with your hard disk.
 * Contact the hardware manufacturer.
 * View the hardware manufacturer Web site.

Note that after you remove the jumper, operations should return to normal. If your computer still does not start after you remove the jumper, you may need a BIOS update to provide correct translation of the drive, and you can use the following workaround as a temporary fix.

To work around this issue:  Start your computer with the Windows 2000 Setup disks, or if your computer supports starting from CD-ROM, start your computer with the Windows 2000 CD-ROM. When you see the &quot;Welcome to Setup&quot; screen, press R to repair, and then press C to start Recovery Console.For additional information about how to use the Recovery Console, click the article number below to view the article in the Microsoft Knowledge Base:

229716 Description of the Windows 2000 Recovery Console

 After you log on to your computer in the Recovery Console, rename the Atapi.sys file in the %systemroot%\System32\Drivers folder to Atapi.sp1.</li> Copy the Atapi.sys file from the service pack uninstallation folder (%systemroot%\$ntservicepackuninstall$) or from the original Windows 2000 installation CD-ROM to the %systemroot%\System32\Drivers folder.</li> Quit the Recovery Console by using the exit command. Note that you should now be able to start your computer normally or view all of the affected partitions correctly.</li></ol>

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MORE INFORMATION
For additional information about a related issue, click the article number below to view the article in the Microsoft Knowledge Base:

254769 Hard Disk Is Misreported as Eight Gigabytes in Size During Setup

Additional query words: 0x7b service pack 2 disk offline unallocated failed mirror

Keywords: kberrmsg kbprb kbsetup kbWin2000PreSP2Fix KB271274

Technology: kbwin2000AdvServ kbwin2000AdvServSearch kbWin2000AdvServSP1 kbwin2000Pro kbwin2000ProSearch kbWin2000ProSP1 kbwin2000Search kbwin2000Serv kbwin2000ServSearch kbwin2000ServSP1 kbWinAdvServSearch

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