The information in this article applies to:
- Microsoft Windows NT Workstation version 3.5
- Microsoft Windows NT Server version 3.5
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:
- 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.
- Replace the existing driver with the one extracted from NT351JJ.ZIP.
- 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.
- Ensure the Y50 jumper (above the SCSI controller external connector)
is enabled (in the on position). This jumper provides termination power.
- 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.
- 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.
- Disable any built-in SCSI controllers on the computer motherboard.
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