[megaimg]

https://wiki.irixnet.org/Network-Install-NetBSD

This guide is the most up to date, but I suspect your disk id is wrong. What does hinv from command monitor say?

>> hinv
System  SGI-IP35
1 600 MHz IP35 Processors
Main memory size: 1024 Mbytes
Graphics Controller
Integral Fast Ethernet
IOC3 serial port
USB (OHCI interface)
Integral SCSI controller 0: Version Qlogic 12160
    Disk drive: unit 1 on SCSI Controller 0, (dksc(0,1,0))
Integral SCSI controller 1: Version Qlogic 12160
    CDROM: unit 6 on SCSI Controller 1, (cdrom(1,6,7))
>>