efp2(7)

efp2 -- Olivetti SCSI host adapter subsystem

Description

The Olivetti SCSI host adapter driver provides a Storage Device Interface (SDI)-compliant interface to the Olivetti adapters that support the Olivetti standard mode interface. These devices include: ESC2, ESC2mb, EFP2, and EFP2 Enhanced. The EFP2 controller provides up to 2 SCSI channels (or ``buses''), each of which can support a maximum of 7 disks.

The Olivetti SCSI Efp2/Esc2 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 a knowledgeable user to access the SCSI bus subsystem directly by using the driver's pass-through interface. This allows the user to issue sb control blocks directly to a SCSI target device. To find the appropriate pass-through device to use for a particular target device, the user should open(2) the character special file for the device in question and then issue the B_GETDEV ioctl (see ioctl(2)). The device value returned should then be used to create a character special file which, when opened, can be used for pass-through (SDI_SEND) ioctl.

NOTE: 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.

ioctl calls

efp2 supports all of the SDI pass-through ioctl(2) commands documented on the sdi(7) manual page.

Files

/usr/include/sys/efp2.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/efp2/space.c

References

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