fdeb(7)


fdeb -- Future Domain 8-Bit SCSI host adapter subsystem

Description

The Future Domain SCSI host adapter driver provides a Storage Device Interface (SDI)-compliant interface to Future Domain 8-Bit SCSI Host Adapters. The supported devices include the TMC-8xx series adapters.

The Future Domain 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 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. 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.

ioctl calls

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


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.

With Future Domain controllers (for example, TMC-850M, TMC-1680, and TMC-3260), the SCSI boot disk must be the disk with the highest SCSI target address (SCSI ID). For example, if you have disks at SCSI IDs 3, 4 and 6, the boot disk must be the disk at SCSI ID 6. If you attempt to boot from a SCSI disk which is not the highest ID, it might not work. Because Future Domain controllers do not consider removable-media disks as bootable, attempting to boot from such a disk might fail.


Files

/usr/include/sys/fdeb.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/fdeb/space.c

References

adsa(7), adsc(7), adse(7), adss(7), dpt(7), ioctl(2), mcis(7), sc01(7), sd01(7), sdi(7), st01(7), sw01(7), wd7000(7)
30 January 1998
© 1998 The Santa Cruz Operation, Inc. All rights reserved.