Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 290)

Chapter 12. Troubleshooting
278 3ware SATA+SAS RAID Controller Card Software User Guide, Version 10.2
0065 Local link down
Event Type
Warning.
Cause
Applies to 9750 and 9690SA controllers.
A cable has been unplugged, removing a link to a controller phy.
0066 Reverted to emergency recovery firmware
Event Type
Information.
Cause
The main firmware image is corrupted because the firmware upgrade was
interrupted by a power failure, or the firmware update was not able to
successfully complete.
Action
Retry the firmware update; if not successful, call technical support.
0070 Drive write fault; some data lost
Event Type
Error.
Cause
A SAS or SATA drive reported this error asynchronously. Some data loss
might have occurred if you are using StorSave Performance mode.
Action
Recommend replacing the drive that reported this error.