I was performing maintenance on a standby Cisco ASA 5508-X firewall that is part of a failover cluster. Upon reload, I noticed that the cluster status remained failed long after the unit should have recovered.
I had datacenter staff connect a serial console and received the following in reboot loop:
Attempt autoboot: "boot disk0:" media drive disk0: not present boot: cannot determine first file name on device "disk0:" autoboot: All boot attempts have failed.
This is definitely new to me, as I was used to a low failure rate on the old ASA 5505 and 5510 firewalls.
This unit is a failover device and doesn't have a current SmartNet. However, what's the best way to recover from this type of failure? Services are not impacted at the moment, but I couldn't find any straightforward procedures to follow.