Hi
I upgraded failover pair of ACE30 modules.
There is this steps in UPGRADE GUIDE
Step 8 
Configure ACE-1 to autoboot from the latest ACE image. To set the boot variable and configuration register to1 (perform auto boot and use startup-config file), use the
boot system image:
and
config-register
commands in configuration mode. For example, enter:
ACE-1/Admin(config)# boot system image:c6ace-t1k9-mz.A5_2_0.bin
ACE-1/Admin(config)# config-register 1
ACE-1/Admin(config)# exit
ACE-1/Admin# show bootvar
BOOT variable = "image:c6ace-t1k9-mz.A5_2_0.bin"
Configuration register is 1
Step 9 On the standby ACE module (ACE-2), perform the following:
•Enter the show running-config command and ensure that all the changes made in the active ACE (ACE-1) are also reflected on the standby ACE.
•Enter the show bootvar command to verify that the boot variable was synchronized with ACE-1.
But my experience is that replication between Admin context does not work.
I must to change boot variable on both Admin contexts.
Is it OK?
Peter
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