es2014 freezed this morning- it complained abouit the filesystem; The hardware logs confirm:
2016-10-17T08:39:42-0500 USR0032 The session for root from 208.80.154.149 using SSH is logged off. 2016-10-17T08:08:49-0500 PDR8 Disk 11 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:49-0500 PDR8 Disk 10 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:49-0500 PDR8 Disk 9 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:49-0500 PDR8 Disk 8 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:49-0500 PDR8 Disk 7 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:49-0500 PDR8 Disk 6 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:48-0500 PDR8 Disk 5 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:48-0500 PDR8 Disk 4 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:48-0500 PDR8 Disk 3 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:48-0500 PDR8 Disk 2 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:48-0500 PDR8 Disk 1 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:08:48-0500 PDR8 Disk 0 in Backplane 1 of Integrated RAID Controller 1 is inserted. 2016-10-17T08:05:19-0500 USR0030 Successfully logged in using root, from 208.80.154.149 and SSH.
Unless someone extracted all disks at the same time without creating logs, I believe this to be a hardware controller issue.