[K12OSN] further troubleshooting on crashed K12 server- getting somewhere

[Jim Kathan]

I just hot-swapped my RAID spare in
I booted in interactive mode,
loading services
got to 99%, and then this: 

starting NFS mountd: /bin/bash line 1: 2231 segmentation fault    rpc mount.d

everything else passed, including DHCP. 
all my thin clients have something now

thin clients are saying Fatal server error: AddScreen/ScreenInit failed for driver 0

rebooted client, its now saying this:

ERROR! Failed to mount the root directory via NFS! Possible reasons include: 1) NFS services may not be running on the server 2) workstation IP does not made to a hostname, either in etc/hosts, or in DNS 3) Wrong address for NFS server in the DHCP config file 4) Wrong pathname for root directory in the DHCP config file
Kernel panic - not syncing: attempted to kill init!

I can't seem to get to a shell on the main server.

Help? :)