johnnym wrote: Is this a 100 Mbps NIC then?
No, it only creates a second port which I believe has the same hardware as the first, so 10Mbps only.
johnnym wrote: I wonder why SGI never thought about external enclosures for single CDROM and disk drives that match the design of the base machine (i.e. CDROM for Octane, etc.).
They do! They offered granite enclosures to match the granite keyboard and mouse of the Indy, Indigo2 etc. I've got the CDROM, Floppy and DDS3 drive versions, which stack nicely just like the Sun boxes. I posted a picture on here many years ago: viewtopic.php?f=5&t=17035&p=132888#p132888
For Octane, there is also an external DVD in dark grey, and presumably tape, floppy as well.