I've disconnected things, I've rebuilt, nothing changes.

An Oct 19th kernel now hangs *consistently* for me, wthin 1 minute to about a
hour and a half of boot.  No messages.  No errors.  No panic.  The machine
just stops.

Can anyone point me at how I try to track this?

A3000/Warp Engine '040.  A couple sf disks on each SCSI interface.
A2232.  All sf it has worked for months on end before.  Argh.

-s