Symptoms
Following the upgrade to 5.1.2, SPs may panic and reboot into service mode. Users are unable to remove the SPs from service mode.
Cause
An invalid NFS export would trigger a panic as the code was trying to process information from the invalid export.
Resolution
Upgrade to 5.1.3 to resolve this issue. It is highly recommended that you do not use 5.1.2 and upgrade all arrays to 5.1.3 even if you have not enountered the problem.