adsc(HW)

adsc -- Adaptec Standard Mode SCSI host adapter subsystem

Description

The Adaptec Standard Mode host adapter driver provides a Storage Device Interface (SDI)-compliant interface to any Adaptec Host Adapters that support the Adaptec standard mode interface. These devices include AHA-1540B/1542B, AHA-1540C/1542C, AHA-1540CF/1542CF, AHA-1640, AHA-1740/1742, and AHA-1740A/1742A. Note that the AHA-174x and AHA-174xA series are only supported by this driver when configured in standard mode. Support for the AHA-174x and AHA-174xA when they are configured in Enhanced Mode is provided by the adse(HW) driver.

The Adaptec Standard Mode 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).

NOTE: Adaptec SCSI controllers cannot be used reliably with Emulex SCSI/ESDI bridge controllers (also known as AT&T DCM/4E). This is due to hardware-induced timing differences between these bridge controllers and any SCSI controllers other than the one that they were designed to be used with. It is not possible to provide a software solution to this problem.

Exercise extreme caution 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.

Files

/usr/include/sys/adsc.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/adsc/space.c

References

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