System architecure does not support this option of this command.
prtconf: Defaulting to non-PROM mode...
System Configuration:  Sun Microsystems  sun4
Memory size: 128 Megabytes
System Peripherals (PROM Nodes):

System Peripherals (Software Nodes):

Sun SPARCsystem 400
    options, instance #0
    vme, instance #0
        ncr, instance #0
            sd, instance #0
            sd, instance #1 (driver not attached)
            sd, instance #2
            sd, instance #3 (driver not attached)
            sd, instance #4 (driver not attached)
            sd, instance #5 (driver not attached)
            sd, instance #6 (driver not attached)
            sd, instance #16 (driver not attached)
            sd, instance #17 (driver not attached)
            sd, instance #7 (driver not attached)
        ncr, instance #1
            sd, instance #8
            sd, instance #9 (driver not attached)
            sd, instance #10
            sd, instance #11 (driver not attached)
            sd, instance #12
            sd, instance #13 (driver not attached)
            sd, instance #14
            sd, instance #18
            sd, instance #19
            sd, instance #15 (driver not attached)
        ie, instance #1 (driver not attached)
        ie, instance #2 (driver not attached)
        ie, instance #3 (driver not attached)
    obio, instance #0
        zs, instance #0
        zs, instance #1
        ie, instance #0
    pseudo, instance #0