Technical data

C.3 Examining and Setting DSSI Device Parameters
The following instructions describe how to change DSSI parameters, using the
DUP driver utility. In the example procedures, the allocation class will be set
to 2.
1. Enter the console mode.
The procedure for programming parameters for DSSI devices from console
mode requires that you issue commands to those devices at the console
prompt >>> . You may enter the commands in either uppercase or lowercase
letters. Unless otherwise instructed, enter each command, then press
Return.
Enter console mode as follows.
a. Set the Break Enable/Disable switch on the system console module to
the enable position (up, position |).
b. Set the Power switch for each unit (both hosts for a dual-host system,
and any expanders for expanded systems) to the on position (|).
Wait for the system to display the console prompt ( >>> ).
2. To display the DSSI devices on embedded DSSI adapters, enter SHOW DSSI
at the console prompt.
The firmware displays two lines of information for each device. For
embedded DSSI, the firmware displays the following.
• The first line contains the bus number, node number, and node name.
• The second line contains the device name and unit number followed by
the device type in parentheses.
For embedded DSSI, the device name consists of the letters DIAu or DIBu
(MIAu or MIBu for the TF-series tape drive. Devices on bus 0 are listed as
DIA. The embedded DSSI host is identified by an asterisk (*).
>>>SHOW DSSI
DSSI Bus 0 Node 0 (R7ALUC)
-DIA0 (RF73)
DSSI Bus 0 Node 1 (R7EB3C)
-DIA1 (RF73)
DSSI Bus 0 Node 2 (R7EB22)
-DIA2 (RF73)
DSSI Bus 0 Node 5 (TFDR1)
-MIA5 (TF85)
DSSI Bus 0 Node 6 (*)
>>>
C–6 Programming Parameters for DSSI Devices