Copy image to standby Cisco ASA

Copy IOS image to standby Cisco ASA unit, for example in order to copy asa942-6-smp-k8.bin from tftp server (10.10.10.10) to Standby ASA disk0, execute following command

asa/pri/act#failover exec mate copy /noconfirm tftp://10.10.10.10/asa942-6-smp-k8.bin disk0:/asa942-6-smp-k8.bin

Here is useful link to run commands on standby ASA

Running Commands on Standby Cisco ASA