Symptom
Nexus switch can experience a AAA Daemon crash and fail to boot due to an NVRAM initialization failure
%SYSMGR-2-SERVICE_CRASHED: Service "AAA Daemon" (PID 15749) hasn't caught signal 11 (core will be saved).
%SYSMGR-2-STANDBY_BOOT_FAILED: Standby supervisor failed to boot up.
%SYSMGR-STANDBY-3-SERVICE_TERMINATED: Service "Security Daemon" (PID 24836) has finished with error code (null) (255).
%USER-3-SYSTEM_MSG: > nvram failure - aaad
VDC Module Instance Process-name PID Date(Year-Month-Day Time)
--- ------ -------- --------------- -------- -------------------------
1 27 1 aaa 23583 2019-11-01 14:10:12
1 27 1 aaa 14312 2019-11-01 15:43:18
1 27 1 aaa 15749 2019-11-01 15:49:36
Workaround
Perform a full switch reload.