Two Cards installed in Mac Pro, FASTA 6GU3 Pro and FASTA 6GU3.
I did the Sierra upgrade directly from Mountain Lion. No Problems with FASTA 6GU3 Pro.
Deinstalled first before upgrading the drivers of the older FASTA 6GU3 (Non-Pro), they are known to cause Kernel Panic. However eSATA still functionable on the old FASTA 6GU3, only USB is dead.
I did the Sierra upgrade directly from Mountain Lion. No Problems with FASTA 6GU3 Pro.
Deinstalled first before upgrading the drivers of the older FASTA 6GU3 (Non-Pro), they are known to cause Kernel Panic. However eSATA still functionable on the old FASTA 6GU3, only USB is dead.