amd(7)

amd -- AMD SCSI host adapter subsystem

Description

The amd host adapter driver provides a Storage Device Interface (SDI)-compliant interface to various SCSI solutions based on the Am53C974 PCscsi and Am73C974 PCnet-scsi chips. The Am53C974 is a Bus Mastering Fast SCSI Controller Chip for PCI Systems, whereas the Am73C974 is a combination Ethernet/SCSI controller. The Am53C974 chip is found on the motherboard of various systems and on controller cards from various manufacturers.

The amd 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(3X).

Files

/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/amd/space.c
/etc/conf/drvmap.d/amd

References

ioctl(2), sc01(7), sd01(7), sdi(7), st01(7), sw01(7)

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.