I've spent a lot of time on this. At some point I started suspecting disk failures, based on dd errors and smartmontools reports. So I replaced the disks, and then replaced the whole box for another nominally identical SunBlade 1500. The panics persisted. I now think that multiple cold reboots might have damaged disks, not the other way round.
In the end I had to conclude that this is not a hardware problem, but the OS issue, perhaps triggered by some heavy disk I/O. Various frequent panics exist at least from r260689 to r263096: r260689: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/186760 r260914: http://www.freebsd.org/cgi/query-pr.cgi?pr=187219 r261798: http://www.freebsd.org/cgi/query-pr.cgi?pr=187080 r263096: http://www.freebsd.org/cgi/query-pr.cgi?pr=187527 I now reverted as far back as r258000, and the system seems stable, but I probably need few more days to be sure. If the system is indeed stable at r258000, when I have the time, I'll try to narrow down the problem revision. But I'd appreciate any hint that might save time. Anton _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"