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After waiting about a month in a half, I finally got a numalink cable so I could numalink together two Silicon Graphics Origin 300s. The idea behind numalink is that you can take multiple machines and link them together in a cluster. In my case, I now have a 8 way R14000A 600mhz and 8GB of ram Origin 300. Like with many things I'm finding with Silicon Graphics machines it was pretty easy to setup. I tried to document it all below. First off I needed to update the "rack" position of my Slave (2nd) Origin 300: [bash] 001c01-L1>brick slot 02 brick slot set to 02 (takes effect on next L1 reboot/power cycle) 001c01-L1>reboot_l1 SGI SN1 L1 Controller Firmware Image B: Rev. 1.44.0, Built 07/17/2006 18:20:38 001c02-L1> [/bash] Next I needed to clear the serial based on the error I got: [bash] 001c02-L1> Not able to determine correct System Serial Number 001c02 == M2002931 Please use the command 'serial clear' on the brick which has the serial number you do not wish to keep Not able to determine correct System Serial Number 001c16 == M2100250 Please use the command 'serial clear' on the brick which has the serial number you do not wish to keep 001c02-L1>serial clear [/bash] Unplugged the power to both and then hooked them up with the numalink cable: [caption id="attachment_1089" align="aligncenter" width="225" caption="Silicon Graphics Origin 300s connected via numalink"][/caption] Then plugged both power cables back in and hit power button on both. To my surprise upon starting up IRIX everything worked. [bash] [SPEEDO2]:~ $ hinv -vm Location: /hw/module/001c01/node IP45_4CPU Board: barcode MNS886 part 030-1797-001 rev -B Location: /hw/module/001c01/Ibrick/xtalk/14 IO8 Board: barcode MJX813 part 030-1673-003 rev -F Location: /hw/module/001c01/Ibrick/xtalk/15 IO8 Board: barcode MJX813 part 030-1673-003 rev -F Location: /hw/module/001c02/node IP45_4CPU Board: barcode MNM964 part 030-1797-001 rev -B Location: /hw/module/001c02/Ibrick/xtalk/14 IO8 Board: barcode MHE546 part 030-1673-003 rev -E Location: /hw/module/001c02/Ibrick/xtalk/15 IO8 Board: barcode MHE546 part 030-1673-003 rev -E 8 600 MHZ IP35 Processors CPU: MIPS R14000 Processor Chip Revision: 2.4 FPU: MIPS R14010 Floating Point Chip Revision: 2.4 CPU 0 at Module 001c01/Slot 0/Slice A: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0x1a CPU 1 at Module 001c01/Slot 0/Slice B: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0x1a CPU 2 at Module 001c01/Slot 0/Slice C: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0x1a CPU 3 at Module 001c01/Slot 0/Slice D: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0x1a CPU 4 at Module 001c02/Slot 0/Slice A: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0xa CPU 5 at Module 001c02/Slot 0/Slice B: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0xa CPU 6 at Module 001c02/Slot 0/Slice C: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0xa CPU 7 at Module 001c02/Slot 0/Slice D: 600 Mhz MIPS R14000 Processor Chip (enabled) Processor revision: 2.4. Scache: Size 4 MB Speed 300 Mhz Tap 0xa Main memory size: 8192 Mbytes Instruction cache size: 32 Kbytes Data cache size: 32 Kbytes Secondary unified instruction/data cache size: 4 Mbytes Memory at Module 001c01/Slot 0: 4096 MB (enabled) Bank 0 contains 1024 MB (Premium) DIMMS (enabled) Bank 1 contains 1024 MB (Premium) DIMMS (enabled) Bank 2 contains 1024 MB (Premium) DIMMS (enabled) Bank 3 contains 1024 MB (Premium) DIMMS (enabled) Memory at Module 001c02/Slot 0: 4096 MB (enabled) Bank 0 contains 1024 MB (Premium) DIMMS (enabled) Bank 1 contains 1024 MB (Premium) DIMMS (enabled) Bank 2 contains 1024 MB (Premium) DIMMS (enabled) Bank 3 contains 1024 MB (Premium) DIMMS (enabled) Integral SCSI controller 8: Version Fibre Channel LS949X Port 0 Integral SCSI controller 9: Version Fibre Channel LS949X Port 1 Integral SCSI controller 10: Version QL12160, low voltage differential Integral SCSI controller 11: Version QL12160, low voltage differential Integral SCSI controller 0: Version QL12160, low voltage differential Disk drive: unit 1 on SCSI controller 0 (unit 1) Integral SCSI controller 1: Version QL12160, low voltage differential Integral SCSI controller 12: Version QL12160, low voltage differential Integral SCSI controller 13: Version QL12160, low voltage differential IOC3/IOC4 serial port: tty5 IOC3/IOC4 serial port: tty6 IOC3/IOC4 serial port: tty7 IOC3/IOC4 serial port: tty8 Gigabit Ethernet: eg1, module 001c01, pci_bus 2, pci_slot 2, firmware version 0.0.0 Gigabit Ethernet: eg2, module 001c02, pci_bus 2, pci_slot 1, firmware version 0.0.0 Integral Fast Ethernet: ef0, version 1, module 001c01, pci 4 Fast Ethernet: ef1, version 1, module 001c02, pci 4 PCI Adapter ID (vendor 0x1000, device 0x0640) PCI slot 1 PCI Adapter ID (vendor 0x1000, device 0x0640) PCI slot 1 PCI Adapter ID (vendor 0x10a9, device 0x0009) PCI slot 2 PCI Adapter ID (vendor 0x10a9, device 0x0009) PCI slot 1 PCI Adapter ID (vendor 0x1077, device 0x1216) PCI slot 2 PCI Adapter ID (vendor 0x1077, device 0x1216) PCI slot 1 PCI Adapter ID (vendor 0x10a9, device 0x0003) PCI slot 4 PCI Adapter ID (vendor 0x11c1, device 0x5802) PCI slot 5 PCI Adapter ID (vendor 0x1077, device 0x1216) PCI slot 1 PCI Adapter ID (vendor 0x10a9, device 0x0003) PCI slot 4 PCI Adapter ID (vendor 0x11c1, device 0x5802) PCI slot 5 IOC3/IOC4 external interrupts: 1 IOC3/IOC4 external interrupts: 2 HUB in Module 001c01/Slot 0: Revision 2 Speed 200.00 Mhz (enabled) HUB in Module 001c02/Slot 0: Revision 2 Speed 200.00 Mhz (enabled) IP35prom in Module 001c01/Slot n0: Revision 6.124 IP35prom in Module 001c02/Slot n0: Revision 6.210 USB controller: type OHCI USB controller: type OHCI [/bash]