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BT(4) BSD Kernel Interfaces Manual BT(4)

NAME

bt — Buslogic/Mylex MultiMaster SCSI host adapter driver

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

device isa
device scbus
device bt

In /boot/device.hints:

hint.bt.0.at="isa"
hint.bt.0.port="0x330"

DESCRIPTION

This driver provides access to the SCSI bus connected to a Buslogic/Mylex MultiMaster or compatible controller:

MultiMaster "W" Series Host Adapters:

Adapter

Bus

Commands

Description

BT-948

PCI

192

Ultra SCSI-3

BT-958

PCI

192

Wide Ultra SCSI-3

BT-958D

PCI

192

Wide Differential Ultra SCSI-3

MultiMaster "C" Series Host Adapters:

Adapter

Bus

Commands

Description

BT-946C

PCI

100

Fast SCSI-2

BT-956C

PCI

100

Wide Fast SCSI-2

BT-956CD

PCI

100

Wide Differential Fast SCSI-2

BT-445C

VLB

100

Fast SCSI-2

BT-545C

ISA

50

Fast SCSI-2

BT-540CF

ISA

50

Fast SCSI-2

MultiMaster "S" Series Host Adapters:

Adapter

Bus

Commands

Description

BT-445S

VLB

30

Fast SCSI-2

BT-545S

ISA

30

Fast SCSI-2

BT-542D

ISA

30

Differential Fast SCSI-2

BT-542B

ISA

30

SCSI-2 (542B revision H)

MultiMaster "A" Series Host Adapters:

Adapter

Bus

Commands

Description

BT-542B

ISA

30

SCSI-2 (542B revisions A - G)

Tagged queueing is supported on ’W’ series adapters, ’C’ series adapters with firmware of rev 4.42 and higher, and ’S’ series adapters with firmware of rev 3.35 and higher.

Boards with certain firmware revisions may lock up under heavy load to certain devices, especially if tagged queueing is used. Should you encounter a problem with your adapter, contact Mylex technical support and ensure you have the latest firmware for your controller.

HARDWARE

The bt driver supports the following BusLogic MultiMaster ’’W’’, ’’C’’, ’’S’’, and ’’A’’ series and compatible SCSI host adapters:

BusLogic BT-445C

BusLogic BT-445S

BusLogic BT-540CF

BusLogic BT-542B

BusLogic BT-542B

BusLogic BT-542D

BusLogic BT-545C

BusLogic BT-545S

BusLogic/BusTek BT-640

BusLogic BT-946C

BusLogic BT-948

BusLogic BT-956C

BusLogic BT-956CD

BusLogic BT-958

BusLogic BT-958D

Storage Dimensions SDC3211B / SDC3211F

SEE ALSO

cd(4), da(4), sa(4), scsi(4)

HISTORY

The bt driver first appeared in the 386BSD patch kit.

AUTHORS

Julian Elischer wrote a driver for the Multimaster cards that appeared in the 386BSD patch kit. The driver was rewritten by Justin T. Gibbs to take advantage of new board features and work with the CAM SCSI framework in FreeBSD 3.0.

Special thanks to Leonard N. Zubkoff for writing such a complete and well documented Mylex/BusLogic MultiMaster driver for Linux. Support in this driver for the wide range of MultiMaster controllers and firmware revisions, with their otherwise undocumented quirks, would not have been possible without his efforts.

BSD February 15, 2017 BSD