Gordon, Nov 8
The flux system is reporting errors related to its Seagate disk. ST9160411ASG, /dev/sbd. Fortunately the software RAID is working, and it is staying up, using the Western digital drive, WDC WD1600BJKT on /dev/sda.
More info is at http://wiki.eol.ucar.edu/sew/ISFS/BaseSystemNotes/ISFSDellPrecisionM6400#Disk_Failure