I have a normal i386 box (Intel 845 mobo) that's been solid for a long
time, running netbsd-4.  I recently did several things

* installed new scsi controller (various, 2940U2W, 29160N, now 29160)
* new LTO-2 drive on above
* new 400G disk, entire disk single filesystem (lfs)

The machine runs amanda and dumps 10-15 GB every night.
Since then, the machine has crashed several times, mostly *not* during
backups, dumping core and rebooting.  All the backtraces look like this
(have rebuilt the kernel and not installed due to testing patches for a
sparc64 issue, so no symbols, but the more-complete backtraces weren't
any more illuminating).  I can't remember the previous crash.

-rw-------  1 root  wheel  1064170004 Jun 30 13:06 netbsd.16.core
-rw-------  1 root  wheel  1064170004 Jul  2 16:11 netbsd.17.core
-rw-------  1 root  wheel  1064170004 Jul  3 18:07 netbsd.18.core
-rw-------  1 root  wheel  1064170004 Jul 10 21:42 netbsd.19.core
-rw-------  1 root  wheel  1064170004 Jul 14 17:14 netbsd.20.core
-rw-------  1 root  wheel  1064170004 Jul 16 16:07 netbsd.21.core
-rw-------  1 root  wheel  1064170004 Jul 19 04:05 netbsd.22.core

(gdb) bt
#0  0xc0509fb6 in cpu_reboot ()
#1  0xc0479dec in panic ()
#2  0xc0512df5 in trap ()
#3  0xc010b0c3 in calltrap ()
#4  0xcc2f0010 in ?? ()
#5  0xcc680030 in ?? ()
#6  0xcc2f0010 in ?? ()
#7  0xc01e0010 in db_search_cmd ()
#8  0xc01deb90 in db_get_value ()
#9  0xc0506a5c in db_stack_trace_print ()
#10 0xc0479dc2 in panic ()
#11 0xc0512df5 in trap ()
#12 0xc010b0c3 in calltrap ()
#13 0xc2910010 in ?? ()
#14 0x00000030 in ?? ()
#15 0x00000010 in ?? ()
#16 0xcc2f0010 in ?? ()
#17 0x0000003a in ?? ()
#18 0xcc2f6598 in ?? ()
#19 0xcc2f6558 in ?? ()
#20 0xc2911f00 in ?? ()
#21 0xc2912008 in ?? ()
#22 0xcc2f6594 in ?? ()
#23 0x01000000 in ?? ()
#24 0x00000006 in ?? ()
#25 0x00000000 in ?? ()


Is LFS now stable (I had the impression it was), or should I revert to
ffs?