Microsoft KB Archive/126459

= Windows NT Backup Fails During Restore with a DPT 2022 =

Article ID: 126459

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Server 3.5

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This article was previously published under Q126459



SYMPTOMS
When you attempt to restore data using Windows NT Backup with a Mylex DAC 960 as the primary SCSI controller and a DPT 2022 as the secondary SCSI controller, the following error message appears:

STOP: 0x0000007B Inaccessible Boot Device

This problem occurs on computers with an EISA bus.



RESOLUTION
To correct this problem:


 * 1) Download the latest DPT 2022 SCSI controller driver (DPTSCSI.SYS) from Distributed Processing Technology's (DPT) bulletin board system (BBS) at (407) 831-6432 or (407) 830-1070. DPTSCSI.SYS is contained in the compressed file NT351JJ.ZIP.
 * 2) Replace the existing driver with the one extracted from NT351JJ.ZIP.
 * 3) If the cache on the DPT 2022 SCSI controller is enabled, use the EISA configuration utility to change the cache from WRITE-BACK to WRITE- THROUGH.

NOTE: If the problem still occurs after you complete this procedure, disable the cache on the SCSI controller.
 * 1) Ensure the Y50 jumper (above the SCSI controller external connector) is enabled (in the on position). This jumper provides termination power.
 * 2) Reduce the SCSI controller bus speed to 5 megabytes per second with CD-ROM drive(s) connected. If you have more than one CD-ROM connected to the DPT SCSI controller, disconnect all but one of the CD-ROM drives. If you have an external CD-ROM drive, ensure it is not installed on a cabinet. Also, ensure the total SCSI cable length, from the DPT SCSI controller to the last terminating device, does not exceed 9 feet.
 * 3) Make sure that the DPT 2022 SCSI controller is seated in a higher slot than the primary SCSI controller on the EISA bus. For example, seat the Mylex DAC 960 SCSI controller in slot 1 and the DPT 2022 SCSI controller in slot 2.
 * 4) Disable any built-in SCSI controllers on the computer motherboard.

Additional query words: trap 0x7b 0x07b prodnt mbps mb blue screen

Keywords: KB126459

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