[SterlingNOVA]

My situation:

Have six Tezro rack sets I'm doing repairs on. Processor and Video bricks
configured for dual display. Irix 64 6.5
All were being finished up, system tested and all checked good.

Came back next morning and was setting up to do final checks.
First set I powered on, system booted to dual display SGI logo splash screen and hung.
I then received a "DT messaging could not be started". Have had this happen before, I got a second
drive and restarted. The unit booted up fully and all hardware checks were good except the console out
check. Entered  "cu -s 9600 -l /dev/ttyd3". It returned an error message "Connection Failed. No Devices Available."
Originally thought I may have a bad port on this repair, however, using the working drive I had I booted the other systems
to check them. ALL SIX sets were failing for same error. I'm certain that this is a software/corrupted disk issue, and not hardware.

As stated before, all the sets had previously checked good.

Have a good console port in to the L1 controller. Cannot find any errors. From system startup menu checked enviroment setting, inventory (hinv)
nothing appears out of whack.

I'm not anywhere close to being an expert in IRIX. Anyone have suggestion where to look in the filesystem to straighten this out?
Appreciate any help.