I have configured a number of SCSI tapes using the mkdev(ADM)
          command.  When I relink the kernel, this message is displayed:

                idmkreg : error updating space.c for Stp

          I have tried removing all of the tape devices, again using
          mkdev(ADM).  When I view the current SCSI tape configuration
          using this utility, it indicates that there are no longer any
          SCSI tape devices configured.  However, this did not prevent
          the error message from being reported when I once again tried
          to relink the kernel.

          The system's tape configuration has become corrupt.

          The following steps detail how to correct this inconsistency by
          removing all additional tape devices from the kernel configuration
          files leaving just the necessary configuration for the Stp0 device
          (scsitape(HW)).

          When you have one tape drive configured, check and modify these
          files as follows:

          * /etc/conf/pack.d/Stp/device.dat

          Remove all other Stp entries leaving just the Stp0 one. The
          Stp0 entry should look like this:

          Stp0:
                  INDEX=Stp0
                  PATH=node0,node1
                  node0=D_SUBSYS,SCSI Tape,0,D_TAPE_SUBSYS,,NULL
                  node1=D_UNIT,Drive 0,0,0,D_REMOVABLE D_NODE,NULL
                  D_USER_MSG=SCSI Tape Drive,8,0,,NULL
                  D_REWIND_NODE = 0
                  D_CTL_NODE = 128
                  D_NOREWIND_NODE = 8


          * /etc/conf/pack.d/Stp/space.c

          The "#define Stp0 0" in this file should read "#define Stp0 68608".


          * /etc/conf/pack.d/Stp/space.h

          Remove the necessary elements in the Stp_tape_cfg array to leave
          just one gen_Stp_route element.


          * /etc/conf/cf.d/mscsi

          Insert an appropriate entry here for your first tape device, for
          example:

                *ha     attach  number  ID      lun     bus
                arad    Stp     0       2       0       0

          Note: Specify the driver name for your SCSI host adapter in the
          first field. In this example, the Adaptec AIC-7770 Host Adapter
          driver "arad" is being used.


          * /etc/conf/sdevice.d/Stp

          Ensure that only one Stp line exists in this file and that it looks
          like:

                Stp    Y    1    0    0    0    0    0    0    0

          Remove any additional lines of this type, if there are any.


          Also, you should remove all of the device nodes associated with
          tape devices in the /dev directory, for example:

                /dev/rStp*
                /dev/nrStp*
                /dev/xStp*

                /dev/rct*
                /dev/erct*
                /dev/nrct*
                /dev/xct*

          The necessary tape device nodes will then be re-created once
          the kernel has been relinked, and the environment re-created.
          (As a backup precaution, you may wish to archive these device
          nodes to a file by using the cpio(C) utility before you remove
          them.)

          This should now allow the kernel to be relinked and the kernel
          environment re-created with just one SCSI tape configured.
          Subsequent kernel device configuration can now be resumed.