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)
30 January 1998
© 1998 The Santa Cruz Operation, Inc. All rights reserved.