More questions on segmap_release & ialloc panics

[George Planansky]

A continuation of an earlier question on this.  Recap:
Our sun 3/280 (4.0x) server has just panicked twice, with:
  panic: ialloc: dupalloc
  panic: segmap_release addr
Also, emacs would bomb when loading:
  Fatal error (4).Illegal instruction
and vi would bomb:
  ld.so call to undefined procedure ioctl from0x4018e

Since then, things got worse and worse.  Vi and emacs failed increasingly
often, for longer times, and then left for good.  Nroff also wouldn't
work.  Eventually the sun crashed and wouldn't reboot successfully. 

That has killed our internet connection, so if anyone mailed me advice to
aer.com, it hasn't gotten through.

Motorola maintenance replaced the cpu, disk controller, and repartitioned
the disks, running Suninstall. The machine now comes up multiuser with a
stripped down rc.local.  With the old rc.local, it hangs on "mount -vat
nfs".  The harried sysop -- for he's doing this, not me -- can do this
mount in single user mode.  It also works if it's moved to an earlier spot
in rc.local, but then something else hangs later in rc.local.  Retries
result in earlier hang ups. Finally, "panic: ialloc: dupalloc" has
reoccured.

Does anyone recognize what's happening, from this fuzzy account?  If you
do, or have advice on what to try, please post to comp.sys.sun or mail to
my umb address below.  Thanks.

George Planansky                      email:  gplanansky.aer.com
Atmospheric & Environmental Research  email:  gplan%umb.edu at RELAY.CS.NET
Cambridge, MA USA                     voice:  (617) 547-6207