BTX errors on Intel SR1200 following gvinum ?crash

[David Adam]

I have a reasonably old (P3-class) Intel SR1200 which has three SCSI 
drives installed. I've installed FreeBSD 7.0-RELEASE over NFS onto the 
first drive.

While configuring gvinum, I issued the following commands:

---
blade# gvinum
gvinum -> list
1 drive:
D r0                    State: down     /dev/da0s1b     A: 32677/32677 MB 
(100%)

0 volumes:

0 plexes:

0 subdisks:
gvinum -> rm r0
---

At this point, my SSH session to the machine stopped responding and 
eventually timed out. I presume it rebooted; I didn't get to the console
in time, and this was all that was displayed:

int=00000006 err=00000000 efl=00010246 eip=0000275c
eax=00091300 ebx=00000000 ecx=00000000 edx=00000000
esi=00000004 edi=00003dd4 ebp=00000000 esp=000903fc
cs=002b  ds=0033  es=0033  fs=0033  gs=0033 ss=0033
cs:eip=f0 49 08 28 00 82 07 28-00 00 00 00 00 00 00
       00 00 00 00 00 00 00 00-00 00 00 00 00 00 00
ss:esp=29 20 00 00 00 00 00 00-00 00 00 00 00 00 00
       00 00 00 00 00 00 00 00-00 00 00 00 00 00 00
BTX halted

This error persists on reboot. I have tried using sysinstall to rewrite 
the MBR (with /boot/mbr-style booting).

The partition table looks like this:
---
blade# bsdlabel da0s1
# /dev/da0s1:
8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:  4194304 66924544    4.2BSD        0     0     0
  b: 66924544        0     vinum
  c: 71119692        0    unused        0     0         # "raw" part, don't edit
---

Some web searching of the various values has turned up no information 
that I can understand; where should I go from here?

The FreeBSD installer disc1 boots ok on this machine, as did the 
7.0-RELEASE install until the gvinum crash. Getting a dmesg out of the 
machine is proving to be a little challenging but if required I will 
provide this tomorrow.

Please keep me in the reply chain; I am not subscribed to -questions.

Thanks,

David Adam
zanchey at ucc.gu.uwa.edu.au