scsi_wd7000(7)                   UNIX System V                   scsi_wd7000(7)


NAME
      scsiwd7000 - WD7000 FASST2 host adapter subsystem

DESCRIPTION
      The WD7000 FASST2 SCSI host adapter subsystem serves as a means for SCSI
      targer drivers (such as scsidisk, scsitape, and so on) to communicate
      on the SCSI bus with target controllers and logical units.  This driver
      inplements the SCSI Driver Interface (SDI) for such SCSI target drivers.

      It is also possible to access this subsystem via the pass-through driver.
      To find the appropriate device to use, while the device is being
      accessed through the target driver, use the BGETDEV ioctl to get the
      major and minor numbers of the pass-though node.  This node may either be
      created or opened for use.

ioctl Calls
      There are three groups of ioctl commands [see ioctl(2) in the
      Programmer's Reference Manual] supported by this driver.  The first group
      contains the ioctl commands used by the driver itself.

            SDISEND       Used to send a pass through command to a target
                           controller bypassing the associated target driver.

            SDIBRESET     Used to reset the SCSI bus.

            BREDT         Used to read the extended edt data structure that is
                           stored in the scsi driver's internal data structure.

            BHACNT       Used to get the value of the number of host adapters
                           the scsi driver is configured for.

            HAVER         Used to determine the Driver Interface Version
                           supported by the driver.  It returns the structure
                           verno, defined in /usr/include/sys/sdi.h.

      The second group is used by the driver and all target drivers that use
      the SDI protocol to communicate with their associated target controllers.

            BGETTYPE      Return the bus name (for example, scsi) and device
                           driver name of a specific device.

      The third group should be supported by all the target drivers that use
      the SDI protocol to communicate with their associated target controllers.
      This ioctl is not supported by the scsiwd7000 driver.

            BGETDEV       Return the pass through major and minor numbers to
                           the calling utility to allow creation of a pass-
                           through special device file.

FILES
      /usr/include/sys/scsi.h
      /usr/include/sys/sdi.h


10/89                                                                    Page 1

scsi_wd7000(7)                   UNIX System V                   scsi_wd7000(7)


      /usr/include/sys/wd7000.h
      /usr/include/sys/sdiedt.h
      /etc/conf/pack.d/scsi/space.c

SEE ALSO
      scsiadaptec(7), scsicdrom(7), scsidisk(7), scsidpt(7), scsitape(7),
      scsiworm(7)

      ioctl(2) in the Programme's Reference Manual

      Programmer's Guide: SCSI Driver Interface (SDI)











































Page 2                                                                    10/89