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Knowledge Base

Err Msg: Inaccessible Boot Device Using the BusLogic BT-542B

Article ID: 106554

Article Last Modified on 11/1/2006

APPLIES TO

Microsoft Windows NT Advanced Server 3.1
Microsoft Windows NT Workstation 3.1
Microsoft Windows NT Advanced Server 3.1

This article was previously published under Q106554

SYMPTOMS

When you configure Windows NT to use the BusLogic BT-542B SCSI host adapter, you may receive the following STOP message after you restart the system:

STOP: 0x0000007B (parameter, parameter, parameter, parameter) INACCESSIBLE_BOOT_DEVICE

CAUSE

This problem may occur because the BusLogic SCSI adapter is configured incorrectly. The BT-542B can be configured to use both an AT IRQ setting and a Host IRQ setting. These must match for Windows NT to correctly access any devices attached to the adapter.

NOTE: There may be other causes for the above error message.

RESOLUTION

To eliminate the error message and use Windows NT, set the AT IRQ and Host IRQ to the same IRQ.

MORE INFORMATION

The following tables are configuration settings for the BusLogic BT-542B SCSI host adapter:

SWITCH BAY 1

SCSI ID  SW1  SW2  SW3
0        OFF  OFF  OFF
1        ON   OFF  OFF
2        OFF  ON   OFF
3        ON   ON   OFF
4        OFF  OFF  ON
5        ON   OFF  ON
6        OFF  ON   ON
7        ON   ON   ON

SW4
SCSI PARITY ENABLE/DISABLE

SW5
DISK > 1GB and not SCO UNIX ENABLE/DISABLE

SW6
SCSI SYNCHRONIZATION NEGOTIATION ENABLE/DISABLE

DMA CHANNEL  SW7  SW8
DISABLE      OFF  OFF
5            ON   ON
6            OFF  ON
7            ON   OFF

SWITCH BAY 2

I/O  ADDRESS  SW1   SW2   SW3
Reserved      OFF   OFF   OFF
134H-137H     ON    OFF   OFF
234H-237H     OFF   ON    OFF
334H-337H     ON    ON    OFF
Reserved      OFF   OFF   ON
130H-133H     ON    OFF   ON
230H-233H     OFF   ON    ON
330H-333H     ON    ON    ON


BIOS BASE ADDRESS   SW4   SW5
0C8000H             OFF   OFF
Disable             ON    OFF
0D8000H             OFF   ON
0DC000H             ON    ON


AT IRQ    SW6   SW7   SW8
Reserved  OFF   OFF   OFF
Reserved  ON    OFF   OFF
15        OFF   ON    OFF
14        ON    ON    OFF
12        OFF   OFF   ON
9         ON    OFF   ON
10        OFF   ON    ON
11        ON    ON    ON

JUMPER SETTINGS

HOST IRQ  W3   W4   W5   W6   W7   W8
9         OFF  OFF  OFF  OFF  OFF  ON
10        OFF  OFF  OFF  OFF  ON   OFF
11        OFF  OFF  OFF  ON   OFF  OFF
12        OFF  OFF  ON   OFF  OFF  OFF
13        OFF  ON   OFF  OFF  OFF  OFF
15        ON   OFF  OFF  OFF  OFF  OFF

HOST BUS
TRANSFER RATE  W11  W13
5.0 MB/SEC.    OFF  OFF
5.7 MB/SEC.    OFF  ON
6.7 MB/SEC.    ON   OFF
8.0 MB/SEC.    ON   ON

W17
HOST I/O CNANNEL READY ENABLE/DISABLE

FLOPPY I/O
ADDRESS           W14
PRIMARY (3FX)     OFF
SECONDARY (37X)   ON

FLOPPY
CONTROLLER  W15  W16
DISABLE     OFF  OFF
ENABLE      ON   ON

Additional query words: prodnt blue trap

Keywords: kbhardware kbsetup KB106554

Microsoft KB Archive/106554

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