Microsoft KB Archive/108239

= Adaptec 1542b Err Msg: Inaccessible Boot Device =

Article ID: 108239

Article Last Modified on 11/1/2006

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APPLIES TO


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

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This article was previously published under Q108239



SYMPTOMS
The drive your computer boots from is connecting to an Adaptec 1542b SCSI controller. During Windows NT Setup, the following STOP message appears:

Inaccessible boot device



CAUSE
This STOP message may have been caused by an incorrect jumper setting on the Adaptec adapter for either the IRQ or DMA speed.



RESOLUTION
Set the jumpers on the Adaptec adapter to their defaults and make sure no other adapters are using the same IRQ levels or base I/O addresses. It is important that the IRQ specified on jumpers 9 through 11 in jumper block 5 is the same as the IRQ specified in jumper block 9. It is also important that the DMA speed, specified by jumper 12 in jumper block 5, be set to 5.7.

Jumper Settings
Jumper Block 5:   SCSI Parity (default = enabled) JP5.3 = ON

SCSI ID (default = 7) JB5.4 = OFF JB5.5 = OFF JB5.6 = OFF

DMA Channel (default = 5) JB5.7 = OFF JB5.8 = ON

IRQ (default = 11) JB5.9 = OFF JB5.10 = ON  JB5.11 = OFF

DMA SPEED (default = 5.7) JB5.12 = ON  JB5.13 = OFF Jumper Block 6 - BIOS AutoSense Control:   JB6.1 = ON Jumper Block 7 - Address Selection:   I/O Address (default = 0x330) JB7.2 = ON  JB7.3 = OFF JB7.4 = OFF

BIOS Wait State Select (default = 0) JB7.5 = OFF JB7.6 = OFF

BIOS Base Address (default = 0xDC000) JB7.7 = OFF JB7.8 = OFF Jumper Block 8 - Floppy Disk:   Floppy (default = enabled) JB8.1 = ON

DMA Request (default = 2) JB8.2 = ON  JB8.3 = OFF

DMA Ack (default = 2) JB8.4 = ON  JB8.5 = OFF

IRQ (default = 6) JB8.6 = ON Jumper Block 9 - DMA / IRQ Selection:   DMA Request (default = 5) JB9.1 = OFF JB9.2 = ON   JB9.3  = OFF JB9.4 = OFF

DMA Ack (default = 5) JB9.5 = OFF JB9.6 = ON   JB9.7  = OFF JB9.8 = OFF

IRQ Request (default = 11) JB9.9 = OFF JB9.10 = OFF JB9.11 = ON  JB9.12 = OFF JB9.13 = OFF JB9.14 = OFF The Adaptec product included here is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

Additional query words: prodnt blue trap

Keywords: kbhardware kbsetup KB108239

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