blc(HW)

blc -- BusLogic SCSI host adapter subsystem

Description

The BusLogic SCSI host adapter driver provides a Storage Device Interface (SDI)-compliant interface to BusLogic SCSI Host Adapters. The supported devices include the BT-445C, BT-54x, BT-64x, BT-74x, BT-75x, BT-946C, BT-956C, BT-948, BT-958, and the BT-958D.

The BusLogic SCSI host adapter driver enables SDI-compliant target drivers (such as sd01 and st01) to communicate on the SCSI bus with target controllers and logical units. This allows normal access to mass-storage devices using standard system interfaces and filesystems.

It is also possible for an application to access the SCSI bus subsystem directly by using the pass-through interface. See pt_open(S).

BusLogic SCSI adapters support the Tag Command Queueing feature as default. To disable this feature, change the value of the blc_do_tag variable in the /etc/conf/pack.d/blc/space.c file from 1 to 0. After you have changed the value in the file, rebuild the kernel for the Tag Command Queueing feature to be effective.

Files

/usr/include/sys/blc.h
/usr/include/sys/scsi.h
/usr/include/sys/sdi.h
/usr/include/sys/sdi_edt.h
/usr/include/sys/sdi_comm.h
/etc/conf/pack.d/blc/space.c

References

adsa(HW), adsc(HW), adse(HW), adss(HW), dcu(ADM), dpt(HW), ioctl(S), mcis(HW), sc01(HW), sd01(HW), sdi(HW), st01(HW), sw01(HW), wd7000(HW)

Notices

Extreme caution should be exercised when using the pass-through interface. It is possible to interfere with normal system I/O and cause hangs if pass-through is used to an active device. Pass-through should only be used to a device that is otherwise quiescent.