Beginning on Wednesday, October 17, Alexandria started freezing, sometimes rebooting itself, and sometimes requiring a manually-forced reboot. We don’t know what is causing this behavior. One possible cause is a RAID firmware upgrade recommended by Dell. This was done on October 10, one week before.
There are no log entries or any other indications of what might be wrong.
At this point we are going to watch the system to try and determine the frequency of the incidents. We may wish to schedule a rollback of the RAID firmware.