High Availability Failure During Update

[TCSPB]

In the middle of updating a pair of FTD 1010's from 6.6.4 to 6.6.5, the upgrade failed due to the HA links going down for some reason during the upgrade.  We use a port channel for HA and it was all down.  When checking the CLI, I noticed that it showed the port channel interface as down and the physical ports as unassociated and admin down.  

After many hours on the phone with Cisco TAC, I am still unable to get HA to function on these devices.  HA was first configured to use a port channel, but I broke HA and reconfigured the HA link to be a single link.  HA still will not come up and the ports just show as down.  Cabling has been verified and the ports have link lights, it just does not show up in the firewall.  

Has anyone here run into a similar issue on these when doing an update on a pair of HA 1010's like this?

[balaji.bandi]

I have used different models never come across this issue,

Can you draw some diagram of how these are connected if this is going via switch ? have you checked on the switch? do you see any Logs?

You mentioned you resolved using a single link ? is this interface part of the port-channel going to the same hardware switch? how about another link?

TAC is the special expertise, we can only advise based on our experience, they might have seen many cases may be aware of any bug? so TAC is not able to provide any feedback?