On Sat, 26 Dec 2009, frantisek holop wrote:

quoted text
> ok.  no more splassert, but everything remains the same.
> i just came back from another hard lock up after trying
> to copy files from one external usb disk to another.
> at some random point the copying just dies and then
> first the processes doing anyhing with disks and then
> gradually the whole system locks up. nothing in the logs,
> no dmesg, nothing.

Set ddb.console=1 in /etc/sysctl.conf and break to the debugger with 
Ctrl-Alt-Esc once the lockup happens. trace and ps there, then continue, 
break to debugger again, etc. This could give you some insight what's 
going on. Not exactly scientific solution, but easy and quick as the first 
attempt.

Regards,
David