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Manual Pages  — BT

NAME

bt – Buslogic/Mylex MultiMaster SCSI host adapter driver

CONTENTS

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-948PCI192Ultra SCSI-3
BT-958PCI192Wide Ultra SCSI-3
BT-958DPCI192Wide Differential Ultra SCSI-3

MultiMaster "C" Series Host Adapters: Adapter
Bus Commands Description
BT-946CPCI100Fast SCSI-2
BT-956CPCI100Wide Fast SCSI-2
BT-956CDPCI100Wide Differential Fast SCSI-2
BT-445CVLB100Fast SCSI-2
BT-747CEISA100Fast SCSI-2
BT-757CEISA100Wide Fast SCSI-2
BT-757CDEISA100Wide Differential Fast SCSI-2
BT-545CISA50Fast SCSI-2
BT-540CFISA50Fast SCSI-2

MultiMaster "S" Series Host Adapters: Adapter
Bus Commands Description
BT-445SVLB30Fast SCSI-2
BT-747SEISA30Fast SCSI-2
BT-747DEISA30Differential Fast SCSI-2
BT-757SEISA30Wide Fast SCSI-2
BT-757DEISA30Wide Differential Fast SCSI-2
BT-545SISA30Fast SCSI-2
BT-542DISA30Differential Fast SCSI-2
BT-742AEISA30SCSI-2 (742A revision H)
BT-542BISA30SCSI-2 (542B revision H)

MultiMaster "A" Series Host Adapters: Adapter
Bus Commands Description
BT-742AEISA30SCSI-2 (742A revisions A - G)
BT-542BISA30SCSI-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-742A
  • BusLogic BT-742A
  • BusLogic BT-747C
  • BusLogic BT-747D
  • BusLogic BT-747S
  • BusLogic BT-757C
  • BusLogic BT-757CD
  • BusLogic BT-757D
  • BusLogic BT-757S
  • BusLogic BT-946C
  • BusLogic BT-948
  • BusLogic BT-956C
  • BusLogic BT-956CD
  • BusLogic BT-958
  • BusLogic BT-958D
  • Storage Dimensions SDC3211B / SDC3211F

AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also supported by the bt driver.

SEE ALSO

HISTORY

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

AUTHORS

Julian Elischer wrote a driver for the Multimaster cards that appeared in the BSD 386 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.


BT (4) June 18, 2006

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